It brought dinosaurs stomping and roaring into the sitting rooms of millions of viewers. Now, 25 years after the series first aired, a new, updated Walking With Dinosaurs is back on the BBC this weekend.
In the intervening years, science has not stood still. About 50 species have been discovered each year since 1999 and the advent of powerful imaging techniques and digital reconstruction have led to major advances in our understanding of what dinosaurs looked like and how they lived. Here are some of the biggest developments.
