Dr Chris sits in for Dr Karl and discusses the Northern Lights, global warming and microwaves among other things

Dr Karl answers listeners' questions about the weird and wonderful world of science, including; why there are groupings of metals in space. What are nature's best painkillers. And is it really alright to eat food you've dropped on the floor, if you pick it up within seconds.

Dr Chris Smith and colleagues with the latest science stories. This week; the deepest undersea vents ever discovered, why nicotine replacement therapies don't work and the controversy over making H5N1 jump species in the lab.

Does electricity flow and why do we get referred pain? Dr Chris Smith from the Naked Scientists sits in for Dr Karl who is on his holidays.

In this weeks Naked Scientists Dr Chris Smith looks at silk worms that spin spider silk, and a gene linked to human deafness.

Dr Chris of the Naked Scientists joins Rhod to answer our callers science questions. Will NASA's new mission to the Moon silence Apollo 11 doubters? Why do rats have such short lives and parrots such long ones and what's the point of vitamin tablets?

Dr Chris from the Naked Scientists is in the chair this week answering our caller's science questions.

Dr Chris stands in for Dr Karl talking to Dotun about self-destructive viruses, the North star, pain & pleasure receptors & the sense of smell.

Dr Chris and colleagues explore what happens when stars collide, the tricks mosquitos use and the reasons why serving Brussels sprouts can be a risky business...

Of course we have some Higgs Boson questions and a host of other queries including are bubbles good for the washing up? Dr Chris Smith deputises for Dr Karl who is still on his hols.