- The Naked Scientists Podcast - Stripping Down Science, On Itunesu

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.