In 1979, evidence emerged of a meteorite strike 65 million years ago that wiped out the dinosaurs and much of life on Earth. Years later, scientists tracked down the 200km-wide crater caused bytheimpact. Butwhydidthe dinosaurs perish and mammals survive? Horizon reveals the story of the mass extinction.
Producer Martin Belderson ; Series editor
John Lynch Repeat Subtitled..... Postponed from 11 July