The discovery of planets orbiting stars other than our own has prompted many to question whether they might harbour life. But, asks one listener this week, what would we look for? Show more
Discover 11,128,835 listings and 279,924 playable programmes from the BBC
The discovery of planets orbiting stars other than our own has prompted many to question whether they might harbour life. But, asks one listener this week, what would we look for? Show more