The age of dinosaurs ended in cataclysm one spring day 66 million years ago when an asteroid 7.5 miles (12 km) wide hit Mexico's Yucatan peninsula, triggering the extinction of those remarkable beasts and about three quarters of Earth's species.
one spring day 66 million years ago when an asteroid 7.5 miles wide hit Mexico's Yucatan peninsula, triggering the extinction of those remarkable beasts and about three quarters of Earth's species.
Based on more than 1,600 fossils, the researchers reconstructed the food chains and habitat preferences of land and freshwater vertebrates. These included the likes of giant meat-eater "In other words, the dinosaurs were struck down in their prime," said ecologist Jorge García-Girón of the University of Oulu in Finland and University of León in Spain, lead author of the research published in the journalBut mammals had begun laying the groundwork for their later ascent, diversifying their ecological niches and evolving more varied diets, behaviors and climate tolerances, García-Girón added.
The fact that the dinosaurs were so well adapted to their climate and environment may have been their undoing.
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