Adam Rutherford tells Alok Jha about his forthcoming BBC Four documentary Cell which traces the story of cells, from their discovery by a Dutch textile merchant in the 17th century to the present, with cells being engineered to order by scientists.
"We're entering the era of the cell," predicts Rutherford.
Also, in the first of our interviews with speakers at the recent TED global conference, Bertrand Piccard explains why he wants to build a solar-powered plane.
