The search for planet Earth's twin – podcast

Ian Sample talks to Stuart Clarke about his new book exploring exoplanets and alien worlds, and how to find another Earth

Many of the thousands of alien worlds discovered around distant stars are unlike anything in our solar system. Some face perpetual hurricane-force winds; others have not one, but two suns.

But some of these planets do have striking similarities to those in our own cosmic neighbourhood. Could an Earth-like planet capable of harbouring life be one of our next discoveries?