In light of the destructive meteor shower in Russia's Urals region last week, we take a look at the impact of other giant space fragments which hit Earth millions of years ago.

Gosses Bluff, Australia: Located in the Northern Territory, this impact crater was formed 142 million years ago by what is assumed to be the impact of a comet or asteroid falling at a speed of 40km/sec. The energy released when the object fell was equivalent to 22,000 megatons of dynamite, with the resulting blast forming an area of ​​24 km with a depth of 5,000 metres.