What does the discovery of the Higgs particle mean? How do flies land upside down on the ceiling? What happens when we divide by zero? Why do healing wounds itch? Does my washing dry by osmosis? How do fibre optics work? What causes a headache? Like this podcast? Please help us by supporting the Naked Scientists

Is the moon brighter overhead? Why do babies have higher heart rates? Do men snore more than women? What is peripheral neuropathy? Why are our organs wet inside? How do electric eels work? Why do wires tangle? What is the basis of a skin graft? This week Dr Chris takes on more tough questions on TalkRadio 702, South Africa... Like this podcast? Please help us by supporting the Naked Scientists

What gives a flame its colour, and what is the hottest part? What limits the height of a skyscraper? How does post-exposure prophylaxis for HIV work? How do they put the lines on a clay tennis court? Why do some songs cause goose-pimples? Why are some people better at withstanding temperature extremes? And can lightning be collected as a power-source? Join us for the answers and some lively chat from Talk Radio 702, South Africa. Like this podcast? Please help us by supporting the Naked Scientists

Who was Phillip Tobias, how do self-focusing binoculars work, are muscle transplants possible, what is the bone structure of a snake, what happens when several sounds interact, will we still be evolving in the future, why is air transparent and what comes up when you clear your throat? Dr Chris has the answers to this week's crop of questions from Talk Radio 702 South Africa. Like this podcast? Please help us by supporting the Naked Scientists

Do birds have a sense of smell? Are penicillin allergies permanent? How do vultures identify dinner? Does light travel forever? Is alcohol added to cooked food safe for an alcoholic? Do viruses have viruses that prey on them? How do bees track down my beer? Are some people genetically programmed to commit crime? Can two twins have different fathers? How did the power of speech first evolve? Dr Chris Smith has the answers... Like this podcast? Please help us by supporting the Naked Scientists