Tuesday, May 8th 2012, 7:10 AM EDT
Today, 21:30 on BBC Radio 4 FM James Lovelock
James Lovelock on elocution lessons, defrosting hamsters and Gaia.
Also read: Gaia creator rows back on climate
by Roger Harrabin, Environment analyst, BBC News
Professor Jim Al-Khalili talks to leading scientists about their life and work, finding out what inspires and motivates them and asking what their discoveries might do for mankind