Pterosaurs and mass extinction

Bildnummer 11808285
Pterosaurs and mass extinction
Artwork of pterosaurs flying over a scene of destruction. Some 65 million years ago,the impact of an asteroid or comet with the Earth provoked one of prehistory's greatest mass-extinctions,when it wiped out the dinosaurs,pterosaurs and many other species. The impact occurred in a shallow sea,off the coast of what is now Mexico,caving out a magma-filled wound some 180 kilometres across. Ejecta was thrown high into the atmosphere. The dust remained there for years,blocking out the Sun's light-giving rays. The heavier ejecta fell to earth in a torrent of molten rocks,hundreds of kilometres from ground zero. Here,pteranodons - flying reptiles - are seen fleeing the onslaught,which has already set fire to the forest behind them
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Credit: Science Photo Library / Garlick, Mark
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