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Science and that is the same physics, medicine, nature, or space, time, brain, life, the universe.

Hello, this week, naked attraction. No, not what you're thinking, we're actually

looking at the magnetic field that's keeping our planet safe, including 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.

I'm Isi Clark.

I'm Chris Smith and this is the Naked Scientists.

The Naked Scientists podcast is powered by UKfast.co.

UK. First up, as anyone who's ever suffered from Jetlag knows, we are indeed all slaves to the

rhythm, in this case are circadian rhythms or body clocks and the

reason we feel so ghastly when our internal clocks go off kilter is because every

cell in our bodies uses time to control what it does and when.

Indeed, tissues grow and repair themselves at certain times of the day.

Our metabolism changes dramatically between dawn and dusk.

A medicines and vaccines given at one time of the day can be much

more effective than the same drug administered just hours later.

...