Dinosaurs were "just really unlucky" that a catastrophic mix of sulphur gases and climate cooling helped speed up their extinction, scientists say.
Climate cooling linked with sulphur gases and the impact of an asteroid proved to be terminal for dinosaurs and other life but also allowed for the diversification of mammals, including primates.
The findings from a report published in Monday's PNAS (Proceedings of the National Academy of Sciences) journal, state the gases were ejected into the Earth's atmosphere after a six-mile-wide asteroid hit what is now the Yucatan Peninsula around 66 million years ago.
