Ask the Naked Scientists

What causes the rainbow of colours around an aircraft's shadow, why are moths and mosquitoes attracted to lights, plasma vs LCD TV - what's the difference, how does a mosquito know when it's full of blood, are you ever too old to learn, and how do scientists calculate the calories in foods? Join Dr Chris for this week's bumper crop of questions from TalkRadio 702... Like this podcast? Please help us by supporting the Naked Scientists

How do melons concentrate water in their flesh? Why do some hairs grow longer than others? What's the advantage of African curly hair? Does the DNA of a donated organ displace that of the recipient? What are sunspots? Join Dr Chris for another mind-stretching mental work out solving your scientific problems as well as news of how mamalian hearts can regenerate themselves, and a new lasrer technique to spot melanoma... Like this podcast? Please help us by supporting the Naked Scientists

This week, the causes of asthma, a new way to "K.O." MRSA, what is lupus and can it be controlled, how do metal-salt pool cleaners work and are henna tattoos safe? Like this podcast? Please help us by supporting the Naked Scientists

This week, how stimulating the brain can help you to think outside the box, why corks in the bed can cure cramps, the inside information on itching, the brain basis of meditation and what happens when we do it, the science of sleep, and where did domestic animals come from? Join Dr Chris as he pits his wits against this week's round up of top science questions on 702... Like this podcast? Please help us by supporting the Naked Scientists

Straight from the horse's mouth, or cow's stomach, this week how scientists have found the genetic clue to better biofuels; also, the brain basis of addiction, the cause of false-positive HIV tests, what causes the colours in a peacock's feathers, is Betelgeuse about to blow up, and what's neurofibromatosis? Join Dr Chris on this week's whistlestop tour of the scientific cosmos as he looks for the answers to life, the Universe and everything... Like this podcast? Please help us by supporting the Naked Scientists

Where do renal calculi come from, can weight loss halt diabetes, how might neuro-feedback help ADHD and autism, what causes panic attacks and are artificial sweeteners safe? Join Dr Chris for the all answers on this week's Ask the Naked Scientists, from Talk Radio 702. Like this podcast? Please help us by supporting the Naked Scientists

Could personal nuclear reactors power towns, why can't eyes be transplanted like livers, is it dangerous not to pee and poo when you need to, do drugs damage sperms and eggs, and how do rain and distilled water differ? Join Dr Chris as he pits his wits against these and other scientific mysteries... Like this podcast? Please help us by supporting the Naked Scientists

How cats find their way back to their former homes, the science of self-winding watches, why sunlight triggers sneezes, the basis of lightning and does an open window deter a strike, how fast gravity propagates, is it better to turn off the hot water in the daytime and why do thunderstorms cause powercuts? Join Dr Chris for the answers in this week's brain-expanding episode of Ask! Like this podcast? Please help us by supporting the Naked Scientists

What's a light-year, why is the earliest dawn not on the solstice, is the Sun hotter in South Africa, what causes neuropathy, can batteries short out in my pocket, is there a non-surgical solution to a squeaky voice, can my cell phone unlock my car and why does tapping a cup of cocoa make the pitch go up? Join Dr Chris for this week's festive selection of scientific conundra, on Talk Radio 702... Like this podcast? Please help us by supporting the Naked Scientists

How did a lightning storm spark a glowing ball above a roof, do atmospheric oxygen levels dip in winter, does anyone naturally not have fingerprints, are humans still evolving, and what's the story behind Lorenzo's Oil? Join Dr Chris for an intellectual work out with this week's round up of brain-stretching science... Like this podcast? Please help us by supporting the Naked Scientists