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 not going to. Hello, welcome to the naked scientists, with me Chris Smith and with Ginny Smith.

This week we're chewing over the topic of food footprints.

How green is your lunchbox and what's the environmental impact of your weekly food shop.

Plus in the news, the prosthetic hand that has allowed an amputee to feel for the first time in 10 years

and we take a look at the 100 year history of this medium, Radio.

And as we always do, we're posing a scientific tea time teaser for you.

This week we'd like you to tell us that a bag of Brazil nuts gives you a dose of radiation equivalent to what.

If you have an answer or you have any thoughts feedback or comments for the program,

please get in touch, it's Chris at the Naked Scientist.

com by email where you can tweet at Naked Scientist.

The Naked Scientists Podcasts Podcast, powered by UK Fast, the UK's best hosting provider,

on the web at UKfast.net.

First this week the Gaya Space Mission, which was launched on the 19th of December, is now orbiting around a virtual point in space which is called L2.

It's about one and5 million kilometers from Earth.

Gea's goal is to create the most accurate map yet of the Milky Way. And this week, its

1 billion pixel camera was tested successfully which is

presumably a very big relief for Cambridge Professor Jerry Gilmore who's

leading the project. Hello Jerry.

Hi Chris.

You're a relieved man?

...