On the Flip Side - Earth's Magnetic Field

This week we're looking at the magnetic field keeping our planet safe, finding out how it's generated and whether some animals can actually see it. Plus, news of a technique to read out the time of our body clocks, the people making the case to reinstate Pluto as a planet, and how red alert signals can spread through plants in just seconds after something starts to eat them. Like this podcast? Please help us by supporting the Naked Scientists