Sandman Science

Tonight, sink slowly down through the Earth: the soil and the bedrock, the deepest cave and the deepest mine, two-billion-year-old water, the Kola Superdeep Borehole, the Moho, the solid rock of the mantle that flows like honey, the birthplace of diamonds, an ocean's worth of water locked in blue crystal, the two great blobs at the bottom of the mantle, Inge Lehmann's hidden inner core, the sea of liquid iron that makes our magnetic field, and the iron heart as hot as the Sun's surface, to float weightless at the very centre, before rising home to the quiet ground under the stars. Narrated slowly over soft music, to help you fall asleep.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:37 The Ground Beneath You
2:57 How We Once Imagined It
4:08 The Garden Worms
5:33 The Bedrock
6:50 The Warmth Below
8:05 The Deepest Cave
9:12 The Deepest Mine
10:24 The Microbe That Carries Everything
11:59 The Oldest Water
13:17 The Deepest Hole
14:17 What the Hole Found
15:43 Weighing the World
17:06 Two Kinds of Crust
18:39 Light From the Earthquakes
20:04 The Moho
21:33 Walking on the Mantle
22:57 The Green Stone
24:19 Rock That Flows
25:29 The Land Still Rising
26:46 The Slow Wheel
28:04 The Map of the Ocean Floor
29:27 Where Diamonds Are Born
30:47 The Diamond Road
32:18 The Blue Crystal
33:40 An Ocean in the Stone
35:02 The Islands of Hawaii
36:45 The Sinking Sea Floors
38:07 The Two Great Blobs
39:36 A Lost World Inside?
41:06 The Bottom of the Mantle
42:30 The First Glimpse of the Core
43:55 Inge Lehmann
45:20 The Core Within the Core
46:21 A Sea of Liquid Iron
47:56 The Planet's Own Magnet
49:24 The Memory in the Lava
51:05 As Hot as the Sun
52:13 The Iron Heart
53:28 The Turning Heart
54:44 The Innermost Core
55:58 The Weight of the World
57:03 Weightless at the Centre
58:13 The Long Fall
59:37 The Way Back Up
1:01:05 The Ground Under the Stars
1:02:32 Rest
1:04:40 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/bjXzJZrnBAk

Support the channel
If these slow journeys help you sleep, you can buy us a coffee: https://buymeacoffee.com/sandmanscience

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the science here follows published, widely reported work: Halley's hollow Earth (1692), Veryovkina Cave (2018 survey), Mponeng mine and Desulforudis audaxviator (Chivian et al. 2008), Kidd Creek ancient water (Warr et al. 2018), the Kola Superdeep Borehole (1970 to 1989, 12,262 m), Cavendish's weighing of the Earth (1798), Mohorovičić (1909), Gros Morne's Tablelands, olivine and ringwoodite (Pearson et al. 2014), post-glacial rebound on Sweden's High Coast, mantle convection and plate tectonics, kimberlites and diamonds, mantle plumes and Hawaii, the large low-shear-velocity provinces and the Theia idea (Yuan et al. 2023), Oldham (1906) and Gutenberg (1914), Inge Lehmann (1936), the geodynamo, Gilbert's De Magnete (1600), Ross at the north magnetic pole (1831), the Brunhes and Matuyama reversals, inner-core rotation studies (Song and Richards 1996; Yang and Song 2023; Wang and Vidale 2024), the innermost inner core (Ishii and Dziewonski 2002; Phạm and Tkalčić 2023), and the gravity-tunnel thought experiment. Speculative ideas are presented as ideas.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and scripts are original to Sandman Science. Narration is an AI voice.

Tonight, fall slowly into the largest planet: past the four great moons and the faint ring, through the bands and the Great Red Spot, the blue poles, the ammonia, middle and water clouds, following the Galileo probe's last hour, down into a world with no surface, where the sky becomes a sea, helium may fall as rain and hydrogen turns to liquid metal, all the way to the blurred heart at the centre, before rising home to see Jupiter again as a bright, steady light in the evening sky. Narrated slowly over soft music, to help you fall asleep.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:39 The Long Way Out
2:57 The Size of It
4:04 A Day of Ten Hours
5:11 The Visitors Before Us
6:24 Four Moons Passing
7:50 Shadows on the Clouds
9:09 The Little Inner Moons
10:25 The Faint Ring
11:44 The Invisible Bubble
13:07 The Radiation Belts
14:32 Lights at the Poles
15:58 The Great Cold Spot
17:04 The Bands
18:27 Rivers of Wind
19:39 The Colours
21:04 The Ammonia Clouds
22:15 The Belt That Disappears
23:36 The Great Red Spot
25:09 How Long It Has Turned
26:31 The Roots of the Storm
27:52 Red Spot Junior
29:14 The String of Pearls
30:29 The Blue Poles
31:53 Lightning in the High North
33:13 The Middle Clouds
34:18 The Water Clouds
35:39 The Probe That Fell
36:45 Fifty-Eight Minutes
38:30 The Warm Deep
39:58 There Is No Surface
41:02 The Sea of Hydrogen
42:28 Helium Rain
44:14 Metallic Hydrogen
45:41 The Magnetic Heart
47:04 The Blurred Seed
48:21 The Centre
49:52 The Glow From Within
51:15 Not Quite a Star
52:42 The First Planet
54:03 The Wandering Giant
55:24 The Sun's Gentle Sway
56:24 The Shepherd of the Asteroids
57:56 The Comet That Broke
59:35 Rising Back Up
1:01:01 A Steady Light
1:02:30 Rest
1:04:16 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/JU23UpL6TU8

Support the channel
If these slow journeys help you sleep, you can buy us a coffee: https://buymeacoffee.com/sandmanscience

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the science here follows published, widely reported work: NASA/JPL mission results from Pioneer, Voyager, Galileo (including the 1995 Galileo probe), Cassini, New Horizons and Juno (Bolton et al.; the Red Spot's depth, the polar cyclones, shallow lightning, the dilute core), Ole Rømer's 1676 timing of Io, Cassini's 1665 spot and the long Red Spot record (including Sánchez-Lavega et al. 2024), the Great Cold Spot (Stallard et al. 2017), H3+ auroras, helium rain models (Stevenson and Salpeter; Wilson and Militzer), metallic hydrogen (Wigner and Huntington 1935), Jupiter's internal heat, the early formation of Jupiter from meteorite isotopes (Kruijer et al. 2017), the Grand Tack (Walsh et al. 2011), the Kirkwood gaps, and Comet Shoemaker-Levy 9 (1994). Speculative ideas are presented as ideas.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and scripts are original to Sandman Science. Narration is an AI voice.

Tonight, drift slowly inward to the smallest things there are: a grain of sand, a speck of dust holding more atoms than our galaxy has stars, pollen and spider silk, the smallest insect and the smallest flower, glass-shelled diatoms, the tiniest living cells, the first photograph of a molecule and of a single atom, the empty space inside every atom, the quarks that are never alone, the Higgs, and the smallest distance that has any meaning at all, before turning back to find that the smallest things built the largest. Narrated slowly over soft music, to help you fall asleep.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:42 A Grain of Sand
3:06 More Atoms Than Stars
4:02 The Edge of Seeing
5:26 The First Look
7:04 The Grain That Remembers
8:44 A Thread of Silk
10:09 A Droplet of Cloud
11:18 The Smallest Insect
12:21 The Smallest Flower
13:54 A Teaspoon of the Sea
15:15 Houses of Glass
17:03 The Most Common Living Thing
18:25 The Smallest Living Cells
19:46 Too Small for Light
21:08 The Viruses
22:39 A Grain of Salt
24:01 Molecules
25:14 The Dance in the Pollen
26:48 The First Photograph of a Molecule
28:05 Writing With Atoms
29:24 How Small an Atom Is
30:36 A Photograph of One Atom
32:05 The Empty Atom
33:42 You Never Quite Touch Anything
34:39 Clouds of Electrons
36:07 Why Gold Is Golden
37:29 The Oldest Thing in the Glass
38:44 Inside the Nucleus
39:48 All of Us in a Sugar Cube
40:52 The Strongest Force
42:19 Three Quarks
43:44 A Quark Is Never Alone
44:43 Where Weight Comes From
45:56 The Electron
47:10 The Lightest Things
48:19 A Cubic Kilometre of Ice
49:48 How Things Have Weight
51:12 Empty Space Is Never Empty
52:33 The Smallest Distance
54:00 The Ideas at the Bottom
55:19 The Middle of Everything
56:38 The Smallest Things Made the Largest
58:07 The Sun Depends on the Smallest Things
59:51 Everything You Are
1:01:20 Small and Still
1:02:48 Rest
1:04:30 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/YfbTYSO5CZ0

Support the channel
If these slow journeys help you sleep, you can buy us a coffee: https://buymeacoffee.com/sandmanscience

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the science here follows published, widely reported work: Leeuwenhoek's letters to the Royal Society, pollen and palynology, spider silk (Darwin's bark spider, Agnarsson et al. 2010), fairyflies (Kikiki huna, Huber and Noyes 2013), Wolffia, marine microbes and Prochlorococcus (Chisholm et al.), diatoms and Bodélé dust (Koren et al. 2006), Mycoplasma, Abbe's diffraction limit, Ruska and Knoll's electron microscope, the mimivirus (La Scola et al. 2003), Brownian motion (Brown, Einstein, Perrin), the first image of a molecule's bonds (Gross et al. 2009), IBM's xenon atoms (Eigler and Schweizer 1989), single-atom photographs (Griffith University 2012, Nadlinger 2018), Rutherford's nucleus, relativistic gold, quarks (Gell-Mann, Zweig, SLAC), the proton's mass from lattice QCD, the electron's roundness (ACME), neutrino mass (KATRIN 2022), IceCube and TXS 0506+056, the Higgs boson (CERN 2012), the Casimir effect (Lamoreaux 1997), the Planck length, inflation and the origin of galaxies, and quantum tunnelling in the Sun. Speculative ideas are presented as ideas.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and scripts are original to Sandman Science. Narration is an AI voice.

Tonight, drift slowly outward to the loneliest places there are: Point Nemo and the spacecraft resting beneath it, Rockall, Tristan da Cunha and the Islands of Desolation, the last lighthouse keepers, the loneliest tree, a winter in the dark at Concordia, Michael Collins alone behind the Moon, the Pale Blue Dot, Sedna on its 11,000 year orbit, the stars between the galaxies, a galaxy with no neighbours, the coldest place in the universe and the most distant single star ever seen, before coming home to the quiet secret that we are not so alone after all. Narrated slowly over soft music, to help you fall asleep.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:34 The Loneliest Spot in the Ocean
3:12 Where Old Spacecraft Rest
4:37 Rockall
5:57 The Island at the End of the World
7:27 The Island of Desolation
8:59 The Last Lighthouse Keepers
10:18 The Island Nobody Lives On
11:59 The Loneliest Tree
13:27 The Tree in the Desert
15:02 The Pole Nobody Reaches
16:35 A Winter in the Dark
18:07 The Quietest Valley
19:39 The Darkest Sky on Earth
21:01 Alone Behind the Moon
22:26 The Last Footprints
23:52 The Quietest Place in the Solar System
25:22 Alone at L2
26:43 A Rover Sings to Itself
28:16 The Pale Blue Dot
29:35 Three Dishes Listening
31:06 The Last Signal
32:34 The Comet That Will Not Return for Ages
34:12 Sedna
35:23 FarFarOut
36:55 Arrokoth
38:29 The Gap Between the Stars
39:47 The Bubble We Live In
41:10 Planets That Drift in Pairs
42:41 The Solitary One
44:10 The Magnificent Seven
45:41 Stars at the Edge of the Galaxy
47:07 Stars Between the Galaxies
48:30 The Faintest Galaxies
49:54 The Galaxy With No Neighbours
51:17 Living at the Edge of the Void
52:46 The Galaxy Lost in Space
54:05 A Sky With No Stars
55:43 The Coldest Place in the Universe
57:10 A Single Star From the Dawn
58:28 The Overview Effect
59:48 Not Alone After All
1:01:15 Rest
1:03:11 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/5zm-Y3RK1cY

Support the channel
If these slow journeys help you sleep, you can buy us a coffee: https://buymeacoffee.com/sandmanscience

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the facts here follow published, widely reported work: Point Nemo (Lukatela 1992) and the South Pacific spacecraft cemetery (NASA, ESA, Roscosmos), Rockall, Tristan da Cunha, the Kerguelen Islands, Trinity House and Northern Lighthouse Board histories, Bouvet Island and its 1964 lifeboat, the Campbell Island spruce (Turney et al. 2018), the Tree of Ténéré, the Southern Pole of Inaccessibility, Concordia Station (ESA, IPEV, PNRA), the National Radio Quiet Zone and Green Bank Observatory, NamibRand Nature Reserve (IDA), Apollo 11 and Michael Collins' Carrying the Fire, Apollo 17, the Moon's far side (Chang'e 4), JWST at L2, Curiosity, Voyager 1's Pale Blue Dot (NASA/JPL), the Deep Space Network, Sedna, FarFarOut and Arrokoth (New Horizons), the Local Bubble (Zucker et al. 2022), JuMBOs in Orion, Fomalhaut, the Magnificent Seven neutron stars, halo and intracluster stars, ultra-faint dwarf galaxies, MCG+01-02-015 (Hubble), the Local Void, NGC 6503, the Boomerang Nebula, Earendel (Welch et al. 2022), and the overview effect. Speculative ideas are presented as ideas.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and scripts are original to Sandman Science. Narration is an AI voice.

Tonight, drift slowly forward in time, all the way to the end: Halley's Comet returning, Vega becoming the North Star, the Big Dipper bending out of shape, the last total eclipse of the Sun, a supercontinent, the Sun swelling into a gentle red giant and fading to a white ember, the galaxies drifting out of sight, the patient red stars that will shine for trillions of years, the last star ever born, and the long, quiet stillness at the very end, before coming home to tonight, one of the brightest times there will ever be. Narrated slowly over soft music, to help you fall asleep.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:50 The Sky Is Moving
3:14 The Comet That Comes Back
4:42 The New North Star
5:55 The Changing Constellations
7:14 The Wandering Poles
8:51 The Falls That Walk Upstream
10:12 The Voyagers' First Stars
11:41 The Longer Days
13:01 The Last Eclipse
14:19 The Star That Will Pass By
15:39 The Star That Will Shine by Day
16:50 The Next Supercontinent
18:20 The Brightening Sun
19:44 The Life Below
20:53 The Cloud in the Southern Sky
22:17 A Galaxy Comes Closer
23:56 Milkomeda
25:25 The Sun Grows Large
26:36 What Happens to the Planets
28:03 The Helium Flash
29:33 The Sun's Last Breath
31:10 The White Dwarf Sun
32:28 The Black Dwarf
33:44 The Galaxies Drift Away
35:07 The Island Universe
36:25 The Fading Afterglow
37:54 The Neighbourhood Becomes One
39:09 The Galaxies Turn Red
40:50 The Patient Red Stars
42:27 The Blue Dwarfs
43:55 The Last Star Is Born
45:15 The Age of Embers
46:23 A Rare New Light
47:40 The Wandering Planets
49:05 The Galaxy Comes Apart
50:27 Do Protons Last Forever?
52:04 Iron Stars
53:40 The Age of Black Holes
55:05 Three Possible Endings
56:51 The Quietest Universe
58:08 Does Time Still Pass?
59:28 Thinking Slowly
1:01:03 A New Beginning?
1:02:35 Why Now Is Rare
1:03:55 Rest
1:05:56 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/aS7BRaagLcQ

Support the channel
If these slow journeys help you sleep, you can buy us a coffee: https://buymeacoffee.com/sandmanscience

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the science here follows published, widely reported work: precession and the pole stars, stellar motions (ESA Gaia), Niagara Falls erosion, Voyager trajectories (NASA/JPL), tidal slowing of the Earth's rotation, the Moon's recession and the end of total eclipses, Gliese 710's close approach, Betelgeuse's expected supernova, future supercontinents, the Sun's slow brightening and red giant phase, the deep biosphere, the Large Magellanic Cloud and Andromeda (Sawala et al. 2025), Milkomeda (Cox and Loeb), planetary nebulae and white dwarfs, black dwarfs, the accelerating universe and its future (Krauss and Scherrer), red and blue dwarfs and the five ages of the universe (Adams and Laughlin), rogue planets, proton decay limits (Super-Kamiokande), Freeman Dyson's Time Without End, the DESI dark energy results, and Roger Penrose's conformal cyclic cosmology. Speculative ideas are presented as ideas.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and scripts are original to Sandman Science. Narration is an AI voice.

Tonight, fall slowly into a black hole: from the country vicar who imagined dark stars in 1783, the letter Schwarzschild sent from the front and the young Chandrasekhar working it out on a ship, out to the heart of our galaxy, where a star loops an invisible giant every sixteen years. Then down, gently, past the glowing disc, the ring where light travels in circles, the shadow and the slowing of time, across the edge and inside, and on to the far future, when even black holes fade. Narrated slowly over soft music, to help you fall asleep.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:39 The Dark Star
3:13 A Letter From the Front
4:58 The Young Man on the Ship
6:25 The Collapse Nobody Believed
8:02 How a Black Hole Is Born
9:47 The Name
11:09 How Small They Are
12:29 The First One Found
14:08 The Hidden Partner
15:50 A Hundred Million in the Dark
17:28 Leaving Home
19:06 The Heart of the Galaxy
20:35 The Stars That Gave It Away
22:00 The Quiet Eater
23:21 Choosing Where to Fall
24:52 The Glowing Disc
26:22 The Jets
28:02 The Brightest Lights in the Universe
29:42 Light That Bends
31:17 The Ring of Light
32:46 The Shadow
34:08 Time Slows Down
35:43 The Last Safe Orbit
37:27 The Spinning Ones
38:58 The Dragging of Space
40:36 The Star Drawn Into a Thread
42:22 The Tides
43:54 What a Friend Would See
45:39 The Edge
47:25 Inside
49:02 The Centre
50:56 Bridges and White Holes
52:36 The Surface That Remembers
54:17 The Faint Glow
56:05 A Black Hole in a Laboratory
57:37 The Smallest Black Holes
59:12 When Black Holes Meet
1:00:45 The Runaway
1:02:19 The Black Hole Era
1:03:55 Even Black Holes Fade
1:05:15 Rest
1:07:20 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/027Zpa-KdLc

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the science here follows published, widely reported work: John Michell's dark stars (1783), Karl Schwarzschild's solution (1915-16), Subrahmanyan Chandrasekhar's limit (1930), Oppenheimer and Snyder (1939), John Wheeler, Cygnus X-1, Gaia BH1 and BH3 (ESA Gaia), the lone black hole OGLE-2011-BLG-0462 (Hubble), Sagittarius A star and the star S2 (Ghez, Genzel; Nobel Prize 2020), X-ray light echoes at the galactic centre, Messier 87's jet, quasar 3C 273 (Maarten Schmidt), the 1919 eclipse (Eddington), the photon sphere and black hole shadow (Event Horizon Telescope), gravitational time dilation and GPS, Roy Kerr's spinning black holes and Roger Penrose, Gravity Probe B, tidal disruption events (AT2019qiz), Jacob Bekenstein and Stephen Hawking, analogue black holes (Jeff Steinhauer, Technion), primordial black holes, GW231123 (LIGO, Virgo, KAGRA), the runaway black hole candidate (van Dokkum et al.) and the far future of the universe (Adams and Laughlin). Open questions are presented as open.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and scripts are original to Sandman Science. Narration is an AI voice.

Tonight, drift slowly outward through the wildest weather in the universe: the coldest place on Earth, diamond dust glittering in the air, a lake where lightning flashes almost every night, rain falling on the Sun, blue sunsets on Mars, hailstones made of ammonia on Jupiter, rain falling from Saturn's rings, raindrops like snowflakes on Titan, diamond rain deep inside Uranus and Neptune, the fastest winds in the solar system, clouds of rubies and sapphires and a planet where it snows sunscreen. Narrated slowly over soft music, to help you fall asleep, and ending where it began, with rain on the window.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:51 The Coldest Place on Earth
3:29 Diamond Dust
4:51 The Hottest Ground on Earth
6:18 The Lightning That Never Stops
7:49 The Wettest Place on Earth
9:26 The Strongest Wind on Earth
10:53 Lightning Above the Clouds
12:40 Clouds That Shine at Midnight
14:15 The Morning Glory
15:50 The Weather on the Sun
17:34 The Night the Sky Turned Red
19:04 The Wind Between the Planets
20:39 The Planet With Almost No Weather
22:09 The Winds of Venus
23:35 A Glory on Venus
24:59 Metal Frost on Venus
26:26 The Blue Sunset
27:49 The Storm That Covered a World
29:34 The Dust Devils
31:11 Snow on Mars
32:40 The Cyclones at the Pole
34:22 Hailstones Made of Ammonia
35:51 The Biggest Auroras
37:19 Io's Collapsing Sky
38:58 The Great White Storm
40:37 The Rain From the Rings
42:18 Raindrops Like Snowflakes
44:02 The Dust Storms of Titan
45:31 The Sideways Seasons
47:13 Diamond Rain
48:38 The Fastest Winds
50:02 The Dark Spot That Vanished
51:35 The Year Neptune's Clouds Vanished
53:05 Blue Skies Over Pluto
54:44 Snow on Pluto's Mountains
56:30 Clouds of Rubies and Sapphires
58:05 The Planet Where It Snows Sunscreen
59:40 The Planet That Heats Up in Hours
1:01:11 Clouds of Sand
1:02:35 A Weather Report From a Brown Dwarf
1:04:03 The Galaxy That Breathes Out
1:05:33 Rest
1:07:43 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/s2wgi3vW2bE

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the science here follows published, widely reported work: Vostok station and satellite surface temperatures in East Antarctica, diamond dust, the Lut Desert (MODIS land surface temperature), Catatumbo lightning (NASA LIS satellite data), Mawsynram rainfall, the Barrow Island gust (WMO), sprites and noctilucent clouds, the Morning Glory cloud, coronal rain, the Carrington Event, Ludwig Biermann and the solar wind, Mercury's sodium tail, Venus superrotation and the Venus Express glory, metal frost on Venus' mountains, Curiosity's blue sunset, the 2018 Mars dust storm and Opportunity, dust devils cleaning Spirit's panels, Martian snow (Phoenix and MRO), Juno at Jupiter's poles (cyclones, mushballs, auroras), Io's atmospheric collapse, Saturn's Great White Storm of 2010, ring rain (Cassini), Titan's rain and dust storms, Uranus' seasons, diamond rain (SLAC 2017), Neptune's winds and dark spots, Neptune's vanishing clouds (2019), Pluto's blue haze and methane snowcaps (New Horizons), WASP-121b, Kepler-13Ab (Hubble 2017), HD 80606 b, VHS 1256 b (JWST), Luhman 16 and the M82 superwind. Open questions are presented as open.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and scripts are original to Sandman Science. Narration is an AI voice.

Tonight, drift slowly outward through the strangest sounds ever recorded: plants that click when they are thirsty, sand dunes that sing, a hum only some people can hear, a whale that sings in a key no other whale uses, the Bloop from the deep Pacific, the wind on Mars, the radio voices of Jupiter and Saturn, a black hole humming a B flat fifty-seven octaves down, and finally the sound of the beginning, still hissing in the static of an old television. Real recordings from NASA, NOAA and LIGO sit softly under the music, narrated slowly to help you fall asleep.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:34 The Quietest Room
3:10 Your Ears Are Singing
4:49 The Plants That Click
6:21 The Elephants' Secret Rumble
7:55 The Seventeen-Year Chorus
9:47 The Bats' Hidden World
11:31 The Whispering Gallery
12:56 The Pyramid That Chirps
14:11 The Ghost in the Machine
15:44 The Singing Sand
17:19 The Hum Some People Hear
18:51 Booms From a Clear Sky
20:38 The Sound of the Northern Lights
22:05 The Whistlers
23:39 The Dawn Chorus of Space
25:07 The Hum of the Earth
26:38 The Laser Lake
28:02 The Singing Ice
29:35 The Seals Under the Ice
31:19 The Crackling Reef
32:44 The Song That Spreads
34:17 The Loneliest Whale
36:01 The Clicks in the Deep
37:43 The Sound Highway
39:17 The Bloop
40:39 The Upsweep
42:20 Into the Silence of Space
44:04 The First Sounds From Another World
45:29 The Wind on Mars
47:01 The Ringing Sun
48:30 The Starquakes
50:15 The Singing Comet
51:54 Jupiter's Radio Storms
53:28 The Voice of Saturn
55:01 The Golden Record
56:40 The Hum Beyond the Sun
58:17 The Ticking Stars
1:00:08 The Black Hole That Sings
1:01:48 The Chirp
1:03:27 The Sound of the Beginning
1:05:12 The Static on the Screen
1:09:14 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/F7QRh7XOls0

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the science here follows published, widely reported work: John Cage and anechoic chambers, otoacoustic emissions (David Kemp), ultrasonic sounds from stressed plants (Tel Aviv University, Cell 2023), periodical cicadas, bat echolocation (Donald Griffin), elephant infrasound (Katy Payne), the St Paul's Whispering Gallery (Lord Rayleigh), the Chichén Itzá chirped echo, Vic Tandy's 19 Hz 'ghost', booming dunes, the Taos Hum, skyquakes and mistpouffers, auroral sounds (Aalto University), whistlers and chorus (Van Allen Probes), the Earth's hum, the Ross Ice Shelf song, Weddell seal song, snapping shrimp, humpback song transmission, the 52-hertz whale, sperm whale codas (Project CETI), the SOFAR channel, NOAA's Bloop, Upsweep and Julia, Venera 13 and 14, Perseverance's microphones, helioseismology (SOHO), Kepler asteroseismology, Rosetta at comet 67P, Jupiter's radio bursts, Cassini at Saturn, the Voyager Golden Record and interstellar plasma waves, pulsars (Jocelyn Bell Burnell), the Perseus cluster B flat (Chandra), GW150914 (LIGO), baryon acoustic oscillations and the cosmic microwave background (Penzias and Wilson). Open questions are presented as open.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and narration are original to Sandman Science; the real recordings used are credited below.

Sound credits
The Bloop, the Upsweep and Julia: NOAA Pacific Marine Environmental Laboratory (PMEL) Acoustics Program
Humpback whale song: NOAA Northeast Fisheries Science Center, Passive Acoustics Branch (Meno-song-NOAA-PAGroup-13)
Earthsong (Van Allen Probes chorus): Science@NASA and NASA's Goddard Space Flight Center
Mars wind: NASA/JPL-Caltech/LANL/CNES/CNRS/ISAE-Supaero
Sound of the Sun: A. Kosovichev, Stanford Experimental Physics Lab, from SOHO/MDI data (NASA)
Juno at Ganymede: NASA/JPL-Caltech/SwRI/Univ of Iowa
Saturn radio emissions: NASA/JPL/University of Iowa
Voyager 1 interstellar plasma: NASA/JPL-Caltech/University of Iowa
Perseus black hole: X-ray: NASA/CXC/Univ. of Cambridge/C. Reynolds et al.; Sonification: NASA/CXC/SAO/K.Arcand, SYSTEM Sounds (M. Russo, A. Santaguida)
Black hole merger GW150914: LIGO Scientific Collaboration / Gravitational Wave Open Science Center (CC BY 4.0)
Sound of the Big Bang: (c) John G. Cramer, University of Washington
Sounds were softened, filtered and levelled for sleep. No endorsement by any of these organisations is implied.

Tonight, drift slowly down through the strangest life on Earth: a forest that is one single tree, the water bear that survived open space, the frog that freezes solid every winter, the octopus that thinks with its arms, the jellyfish that grows young again, a shark that may be four hundred years old, the glowing creatures of the deep, and finally the quiet life living inside the rock beneath the sea floor, narrated softly over calm music to help you fall asleep.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:49 The Forest That Is One Tree
3:31 The Oldest Tree
4:55 The Largest Living Thing
6:27 The Brainless Problem-Solver
8:12 The Water Bear
9:58 The Frog That Freezes
11:44 The Sloth's Garden
13:21 The Bird That Copies Everything
14:55 The Animal Nobody Believed
16:28 The Animal That Does Not Grow Old
18:10 The Longest Journey
19:44 The Journey of Four Generations
21:17 The Animal That Grows Back
22:53 The Fish That Waits for Rain
24:38 The Eel That Is Not an Eel
26:15 The Sisters Without Brothers
27:57 The Animal That Sees More Colours
29:32 The Mind in the Arms
31:02 The Shape-Shifter
32:36 The Turtle's Map
34:06 The Jellyfish That Grows Young
35:50 The Heaviest Bony Fish
37:30 The Largest Animal That Has Ever Lived
39:03 The Whale With Old Harpoons
40:31 The Oldest Shark
41:53 Into the Twilight
43:29 The Sea That Glows
44:55 The Longest Animal
46:37 The Gentle Vampire
48:21 The Fish With a See-Through Head
49:54 The Giant Squid
51:36 The Fish That Carries a Lantern
53:12 The Whale Fall
54:59 Life Without the Sun
56:44 The Snail With Iron Armour
58:10 The Deepest Fish
59:50 The Giant Single Cells
1:01:34 The Microbe That Lives Alone
1:03:27 The Sleepers Beneath the Sea
1:05:12 The Hidden Half
1:09:21 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/-tDS-Kji6ho

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the natural history here follows published, widely reported research: Pando and the Malheur honey fungus, the Methuselah bristlecone pine, Physarum slime-mould maze and Tokyo-network experiments, tardigrades in space (FOTON-M3) and revived after 30 years, freeze-tolerant Alaskan wood frogs, naked mole-rat longevity and anoxia tolerance, Arctic tern tracking, monarch migration, axolotl regeneration, the South American lungfish genome, Electrophorus voltai, bdelloid rotifers revived from permafrost, mantis shrimp vision, octopus neuroscience, the mimic octopus, Turritopsis dohrnii, the Azores ocean sunfish, blue whale heart rates, bowhead and Greenland shark age estimates, Monterey Bay bioluminescence surveys, the Ningaloo giant siphonophore, the vampire squid, the barreleye, the 2012 giant squid footage, Osedax, the 1977 Galapagos vents, the scaly-foot snail, the 8,336 m snailfish, Mariana Trench xenophyophores, Desulforudis audaxviator, 100-million-year-old seafloor microbes and the Deep Carbon Observatory. Estimates are presented as estimates throughout.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and scripts are original to Sandman Science. Narration is an AI voice.

Tonight, drift outward through the mysteries of space that nobody can yet explain - the Sun's crown that is hotter than the Sun, the hexagon on Saturn, the Wow! signal, the particle from nowhere, dark matter, dark energy, the slow hum of the universe, and finally the oldest question of all - narrated softly over calm music to help you fall asleep.

Dim the lights, lower the volume, and let yourself drift.

Chapters
0:00 Where We Begin
1:45 The Sun's Hot Crown
3:25 The Quiet Sun
5:02 The Faint Young Sun
6:38 The Missing Sunlight Particles
8:23 Where the Oceans Came From
9:52 The Planet That Spins Backwards
11:26 The Methane on Mars
13:04 Where the Water Went
14:40 The Fuzzy Heart of Jupiter
16:09 The Shrinking Storm
17:41 The Hexagon
19:16 The Cold Heart of Uranus
21:04 The Edge of the Belt
22:32 Planet Nine
24:09 The Cloud Nobody Has Seen
25:39 The Mystery That Was Solved
27:22 The Wow! Signal
29:14 Where Is Everybody
30:59 The Giant Around the Tiny Star
32:42 The Bubbles Above the Galaxy
34:21 Inside a Black Hole
36:15 The Flashes From Far Away
38:19 The Invisible Matter
40:00 The Galaxy With Almost None
41:40 The Strange Circles
43:05 The Great Attractor
44:32 The Particle From Nowhere
46:19 The Brightest Flash Ever Seen
48:10 The Hum of the Universe
50:19 The Glowing Blobs
51:48 The Missing Lithium
53:15 The Too-Smooth Universe
54:50 The Cold Spot
56:35 The Two Speeds of the Universe
58:29 The Force Pushing Everything Apart
1:00:13 The Weakest Force
1:01:35 Why There Is Anything at All
1:03:10 Before the Beginning
1:06:51 Ambient Tail (Music Only)

About Sandman Science
Slow, gentle journeys through the universe and the natural world, narrated calmly over soft original music, made for falling asleep and quiet minds. New journeys added regularly.
Watch the video version on YouTube: https://youtu.be/AOrlB1dFVI8

Best experienced at a low volume, as you fall asleep.

Sources for the science in this episode: the astronomy here follows published, widely reported results - the coronal heating problem and the Parker Solar Probe, the Maunder Minimum, the faint young Sun paradox, the solar neutrino problem and SNO, Mars methane (Curiosity and the Trace Gas Orbiter) and InSight, Juno at Jupiter, Cassini at Saturn, Planet Nine, the Pioneer anomaly, the Wow! signal, the Fermi bubbles, fast radio bursts, dark matter, odd radio circles, the Oh-My-God and Amaterasu particles, GRB 221009A, the NANOGrav gravitational-wave background, the lithium problem, the CMB Cold Spot, the Hubble tension and DESI. Open questions are presented as open throughout.

These videos are for relaxation and sleep. They are not medical advice or a treatment for insomnia or any health condition.

Music and scripts are original to Sandman Science. Narration is an AI voice.