Terry Gross

Alastair Fothergill and Mark Linfield are the directors behind the hit nature documentary series Planet Earth. Their new movie, Earth, uses some of the same footage but is "character-based" rather than "habitat based."

Author J.G. Ballard died April 19 from cancer. The science fiction writer produced more than 20 novels and short story collections, including Empire of the Sun and Love & Napalm: U.S.A. Fresh Air remembers Ballard with an archival interview.

Drugs prescribed for attention deficit disorder, narcolepsy, epilepsy and other conditions are being used by people who don't need them, in an effort to enhance brain function. Journalist Margaret Talbot discusses the trend.