Extinction of dinosaurs 'led to mammals growing 1000 times bigger'

Mammals grew in size 1000-fold after being left a food bonanza by the extinction of the dinosaurs, research has shown.

From their origins as small shrew-like animals, some became enormously large - and the same pattern was seen all over the world.

They included giants such as Indricotherium, a hornless rhinoceros relative from Eurasia that stood 18 feet high and would have dwarfed an African elephant... Read More