SpaceTime Series 28 Episode 19
The Astronomy, Space and Science News Podcast
New Insights into Earth's Water, Asteroid Bennu's Composition, and Marsquake Triggers
In this episode of SpaceTime, we investigate a groundbreaking study that challenges previous beliefs about when water arrived on Earth. New findings suggest that water may have come in during the later stages of Earth’s formation, providing fresh perspectives on the origins of life on our planet. The study highlights the importance of molybdenum isotopes in understanding the timing of water delivery and the conditions necessary for life.
Searles Lake and Asteroid Bennu
We also explore the intriguing similarities between Searles Lake in California and the asteroid Bennu, as researchers find that both environments share common water-soluble minerals. The Osiris Rex mission has revealed that Bennu's samples contain evaporite minerals formed under wet conditions, shedding light on the potential for life-sustaining elements in our solar system's past.
Meteoroid Impacts and Marsquakes
Additionally, a new study indicates that meteoroid impacts may play a more significant role in triggering marsquakes than previously considered. Analyses from NASA's Mars InSight lander reveal that many seismic events on Mars could be linked to impacts, challenging existing assumptions about the planet's seismic activity.
00:00 Space Time Series 28 Episode 19 for broadcast on 12 February 2025
00:49 Water arrival on Earth
06:30 Searles Lake and asteroid Bennu
12:15 Meteoroid impacts and Marsquakes
18:00 Changes in men's height and weight
22:45 Discovery of ancient bird fossils in Antarctica
27:00 The best way to boil an egg
30:15 AI and national security concerns
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✍️ Episode References
NASA
https://www.nasa.gov
Geochemistry and Cosmochemistry
https://www.elsevier.com/journals/geochemistry-and-cosmochemistry
Nature
https://www.nature.com
Geophysical Research Letters
https://agupubs.onlinelibrary.wiley.com/journal/19448007
Biology Letters
https://royalsocietypublishing.org/journal/bl
Nature Communications
https://www.nature.com/ncomms/

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