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Answering all your cosmic conundrums this week are Drs Chris, Dave and Phil who discuss why blood is red, the size of the ozone hole, how to make magnets, the best way to get rid of excess mucus, and sticking with the gooey theme, Adam Summers discusses how some tarantulas keep a firm hold on the ground by producing sticky silk from their feet. Moving much further away from terra firma, New Horizons scientist Hal Weaver talks about the mission to Pluto, what they hope to find there and why the Kuiper Belt objects are so intriguing, and in Kitchen Science, Derek Thorne and Hugh Hunt carry out their own launch by throwing engineering textbooks high into the air.

Chemistry and lightning quick reactions are under discussion this week as Emma Schofield explains what a catalyst is, how catalytic converters work and how catalysts can help to clean up the atmosphere, and Fraser Armstrong discusses fuel cells, using hydrogen as a fuel and how enzymes naturally found in bacteria are making hydrogen a more realistic energy source for the future. In Kitchen Science, both guests are used as guinea pigs as Dave Ansell demonstrates the wonder of enzymes with nothing but a slice of bread...

Explaining how science can help us dig up the past is Lawrence Owens, who uses teeth and bones to uncover the life and sometimes gruesome death of mummies in Peru and Bolivia, and Harriet Allen describes how the pollen record and layers of lake sedimentation can reveal what the environment was like 10 000 years ago. Also on the show, Nick Brooks talks about how climate change in the Sahara may have given rise to complex human societies, and taking us back even further in human evolution is Clive Finlayson, who discusses how a new fossil discovery shows that Neanderthals were alive and kicking in Gibraltar well after the arrival of modern humans. Leaving the past behind them in Kitchen Science, Derek and Dave make their very own futuristic forcefield.

In the hot seat this week is Beverley Glover, who will describe how flowers warm their nectar to entice passing pollinators, real life weatherman John Law discusses weather predictions and how to calculate temperature days in advance, and Marcel Visser explains how warming weather and earlier springs spell disaster for migrating birds. Also on the show, we will hear from Katey Walter about a new source of atmospheric methane, and in Kitchen Science, Derek and Dave get their hands wet in the name of discovering how the human body judges temperature.

The Naked Scientists are back to answer all your burning science questions. Dr Chris, Dave and Helen tackle hot flushes, why spiders love living in our houses, how many stars are in the Milky Way, and why cows in a field always face in the same direction... We will also be connecting direct to Norwich, the host of this years British Association Science Festival, to hear about a world record attempt at the most people in a bubble, and sticking with bubbles, Dave and Derek make lava lamps in Kitchen Science.

In our last show before the summer, Dr Chris, Dave and Derek answer all your questions on science, technology and medicine including why paintings fade in sunlight, why body hair grows at different rates, whether UV light poses a danger at the disco, how weightlessness can be experienced on Earth, and sticking with space, Steve Miller explains the origin of Jupiter's giant red spot and its smaller relative red spot junior. We will also be repeating a famous experiment to see if people can accurately estimate physical attributes from the sound of someones voice, and in Kitchen Science, Derek and Dave dice with death as they calculate the drag on a flag at 70 miles per hour...

I predict a riot... or not. This week we're joined by crowd control experts Dr Clifford Stott, from Liverpool University, and Dr John Drury, from Sussex University, wholl be discussing why violence kicks off at football matches, how to spot a spat and the science of mass evacuation. Taking us on a flight of fancy, Dr Gay Gibson, from the University of Greenwich, who describes her research into the harmonious music of mosquitoes, and in Kitchen Science, Derek Thorne bangs out a tune from an oven shelf...

Marine biology and conservation specialist Dan Laffoley, from English Nature, and Chris Lynam, from the University of St Andrews join us to dissect the state of the worlds oceans and marine protected areas. From the conservation science institute in Alaska, Bruce Wright takes us on a tour of the world of salmon sharks, and in kitchen science we do battle against the atmosphere using a Magdeburg sphere.

Rutherford Appleton Laboratory astrophysicist Chris Davis joins us to shed light on the structure and workings of the sun and the newly-launched STEREO mission, Cambridge University engineer Jeffery Lewins talks nuclear, and Anna Nicolaou asks why do some people burn whilst others turn brown? On a practical level, in kitchen science, Derek and Dave lift the lid on how suncream works.

In honour of the annual hoards if bleary-eyed hayfever sufferers, we are joined by Carrock Sewell who describes how the immune system works, what causes allergic reactions and how we might be able to cure them, and Mark Booth discusses parasites, how they suppress and evade the immune system and how the Matangini Project attempts to provide parasite-free water in Africa. Sticking with the African continent, Derek Thorne travels to Tanzania to learn how to make ugali in Kitchen Science.