Boldly going where no science show has gone before.

The Naked Scientists.

Hello,

welcome to this week's naked scientists with Dave Ansel.

Hello, Dave.

Hello.

So with Cat Arnie, hi, Kat.

Hello.

And I'm of course, Chris Smith.

And in the news this week, scientists have discovered how they can turn

stem cells into germ cells in other words spirms and eggs and that could offer hope

to people who are affected by infertility. Also at 1 million frames per second is this the world's fastest camera.

In fact, it's so fast that scientists say they can see individual nerve impulses traveling

along nerves and we'll find out how it works in just a

moment and with an eye on the 2012 Olympics scientists have found that people with

high heels are actually the fastest runners but we're not talking stilettos though, thank God.

You've never seen me in a pair of heels. Anyway, thanks Chris. Also this week it's our

science question and answer show. We've got an inbox bulging with your

questions including why you shouldn't defrost and then

reheat food too many times. Can copper or magnetic bracelets benefit your health and

if hot air rises why are the tops of mountains so cold?

That is a great question, so we'll be answering all of those and more.

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