Evolution Loves Crabs and Doesn't Like Things to Be Crab?

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This week, we look at why thinking really hard might make you tired. A new study in biology may give us a bit of a clue as to why this happens. And it could be useful for helping people who have mentally taxing jobs when they can't be mentally alert. If you'd like to hear more about these stories and find out where you can sign up for the weekly Newsquiz, visit CNN iReport here.

00:47 Evidence of a proton’s charm

For decades, scientists have debated whether protons have ‘intrinsic charm’, meaning they contain elementary particles known as charm quarks. Now, using machine learning to comb through huge amounts of experimental data, a team have shown evidence that the charm quark can be found within a proton, which may have important ramifications in the search for new physics.

Research article: The NNPDF Collaboration

News and Views: Evidence at last that the proton has intrinsic charm

11:26 Research Highlights

How sea sponges ‘sneeze’ to clean their filters, and why bonobos’ infantile behaviour helps them receive consolation after conflict.

Research Highlight: How a sponge ‘sneezes’ mucus: against the flow

Research Highlight: Bonobo apes pout and throw tantrums — and gain sympathy

13:52 Briefing Chat

We discuss some highlights from the Nature Briefing. This time, the repeated evolution of the crab body-shape, and why demanding work can lead to mental fatigue.

Discover: Evolution Only Thinks About One Thing, and It’s Crabs

Nature News: Why thinking hard makes us feel tired

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