And the Hello, Hello. This week we'll be talking all about things marine from issues facing coral reefs

to the unique relationship that the British overseas territory the Pitcairn Island has with the rest of the sea.

Plus in the news we'll hear about a skin patch that could replace vaccinations,

and are we on the verge of developing a contraceptive pill for men?

Certainly a tough question that one, I could say hard nut to crack.

On the subject of hard questions, can you also have a go at our teaser question?

What we're asking you this week is if we shone two identically bright lights from the seabed, one of them blue and one of them red,

which one would look brightest from the surface.

The Naked Scientists Podcast is powered by UKfast.co. UK.

Let's kick off with a look at what's been making science headlines. Helen.

Humans who were alive 400,000 years ago have had their genome sequenced, or at least part of

them.

For the first time, researchers have extracted and sequenced the mitochondrial DNA from an incredibly

ancient human and it's offering up a whole new way of looking at human evolution by uncovering

some unexpected links.

Well, the findings were published this week in the journal Nature

and they come from a team at the Max Planck Institute of Evolutionary

anthropology in Leipzig in Germany.

Well, these ancient fossils come from Spain at a site called Sima de la Soyceus, the pit of bones.

And trust me when I tell you that this must be one of the most difficult places to work.

Check this out, to reach it, the scientist had to crawl

for hundreds of meters through a network of tiny dark tunnels,

...