So, so, so skin.

Keep your good going and breeze through busy days with mullah lights.

Now with a new thicker recipe with Vitamin B6 and Vitamin D. Or go on then? Mull a light, get the good going. You're going to be. Hello, welcome to the naked scientists with me Chris Smith and with Cat Arnie.

This week, how our genes determine who our friends are,

what a 50 million year old sea urchin

can tell us about how to find your car keys,

and what can be done to reduce your chances of getting Alzheimer's disease.

Plus, is extinction forever?

Later on we'll be finding out about plans to bring mammoths back to the tundra

and resuscitating ancient bacteria frozen in ice for thousands of years.

The Naked Scientists Podcast is powered by UKfast.co.uk. First you might might have a lot more in common with your friends than you thought

shared interests and hobbies bring people together but new research has shown that we may be picking friends

with similar genes to our own as well.

A new studies analyze the genes across friends and strangers

and has found that you can predict friendships

simply by looking at genetic similarities.

Chris caught up with James Fowler from the University of California, San Diego.

Well, we looked all across the human genome at different markers and found that friends tend to share genes

in common and in fact the level of similarity between friends is so strong it's as

if that friend who we don't share a common ancestor with is our fourth

cousin. Even more interesting than that, one of the things that we found was that

those genes that we share in common with our friends are also the ones

...