Why Are Planets Round?

04 November 2011
Presented by Chris Smith, Redi Tlhabi.

Share

Why do more eggs means less water in an egg boiler? Does a hip replacement shorten a leg? Where do beetles go in winter? And why are planets round? Plus, how killing off aged cells improves vitality, why pollution is intensifying cyclones and how skin cells can see UV...

Comments

Add a comment