This week, cleaning out old cells prolongs life.

All of the mice that were treated to remove their senescent cells

had a lifespan extension neighboring from 25 to 35%.

And the comedian who's taking on neuroscience.

Maybe what we've discovered is the bit of the brain that lights up

when we spot an elementary conceptual blunder in experimental design.

Plus how regrowing forests could help fight climate change.

This is the nature podcast for February 4, 2016.

I'm Kerry Smith.

And I'm Adam Levy.

Save the rainforest.

It's a mantra chanted by environmentalists for decades.

And there are many good reasons why it's pretty good idea,

especially when it comes to climate change.

Deforestation accounts for up to 20% of global carbon emissions. So, taking care of forests could help stave off climate change. But what if it's

too late? What if an area has already been deforested? Well, Lawrence Porter from the University

of Varganingen and his team have been studying how the

regrowth of forests, called secondary forests, could factor in. Secondary forests regrow after

forest has experienced some kind of disturbance like a fire or logging or clearing for farmland.

Porter and his team are keen to work out a bit more about the regrowth process, and Noah

Baker gave him a call. First, they're very important. They cover large parts of the terrestrial

service area, and they store a large amount of carbon, and they're responsible for a large

...