08/12/2011

Available for over a year

Quentin Cooper asks if it's worth extracting carbon dioxide from the atmosphere and how it might be done with carbon nanotubes. He hears how industry is planning for a world shortage of rare elements. A 500 million year old monster eye with 16 000 lenses and the first finalists shortlisted from listeners who want to be a scientist. Producer: Martin Redfern.