Question of the Week, from the Naked Scientists

This week, we discover the reasons for those aches and pains known as cramps. What causes them and how can they be prevented? Like this podcast? Please help us by supporting the Naked Scientists

If you're hanging onto the back of a car, how fast would it have to go before you were lifted off the ground? Plus, we ask about muscle cramp and how to avoid it! Like this podcast? Please help us by supporting the Naked Scientists

Is it possible to walk in a straight line if one is blind or blindfolded? Are blind people better at it? Find the answer in this Question of the Week. Plus, we ask how fast a car would have to travel in order to lift an outdoor passenger from the ground. Like this podcast? Please help us by supporting the Naked Scientists

Which is better for the environment: an e-card or a traditional paper card? We have the answer for you in this (not terribly romantic) Question of the Week! Plus, we ask if people still walk in straight lines when they can't see where they're going... Like this podcast? Please help us by supporting the Naked Scientists

Some hand washes claim to kill 99.99% of all germs. What do these advertising slogans really mean? Would two hand washes kill 100 per cent of all germs? Plus, we ask if sending an e-card is really more environmentally friendly than a paper one. Like this podcast? Please help us by supporting the Naked Scientists

Light is supposed to be massless so how is it that gravity makes a beam bend? Plus, we ask what the hand wash adverts mean when they claim to kill 99.9% of known germs. Like this podcast? Please help us by supporting the Naked Scientists

In this touchy-feely Question of the Week we find out which bits of the brain interpret text and Braille. Are they the same? Plus, we ask how it is that light bends under gravity, even though it's supposed to be massless! Like this podcast? Please help us by supporting the Naked Scientists

When you think about it, drinking the milk of a cow is a little odd. Are we the only animal in the world that drinks the milk of another species? Why do we drink it anyway? Plus, we ask how Braille is processed in the brain. Like this podcast? Please help us by supporting the Naked Scientists

This week we find out why the camera loves some of us and seems to seek revenge on others as we investigate what makes someone photogenic... Like this podcast? Please help us by supporting the Naked Scientists

If blood is full of iron does that mean magnetic jewellery is good for you? We find out. Plus, we ask if there is any science to being photogenic. Like this podcast? Please help us by supporting the Naked Scientists