The Hello welcome to the naked scientist with me Chris Smith and also with Cat Arnie.

Today we're browsing the story of the internet, how it works, how just by using it you're

helping to translate millions of old books without even realizing it.

And we dip into the dark web, a mysterious off-limits arm of the internet where you can hire

a hitman, order weapons, or even score illegal drugs.

Not that we would advise doing any of those things.

Plus in the news this week week the worm that was found lurking

in a patient's brain, how scientists have grown pain nerve cells in a petri dish, and what

do dogs here when we speak to them. The Naked Scientists Podcast is powered by UKfast.co.uk.

UK. In recent weeks stories about space have dominated the headlines. As we speak

scientists are analyzing data that's been sent back from organic molecules

on the surface of Comet

67 P. Churyumov-Girasimenko, and we've heard about a newly planned

mission to the moon. But this week a warning came from researchers in

Switzerland who showed that DNA on the outsides of a

sounding rocket, that's an unmanned craft sent up into space for research, could survive

intact even under the extreme conditions beyond our planet. And that means

team studying the origins of life in the solar system and beyond need to be very

careful not to contaminate what might be out there with DNA from Earth.

I caught up with Professor Mark Sefton from Imperial College,

who also works on organic molecules in space,

to get his views on this new study.

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