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Were dinosaurs headed for extinction even before massive asteroid strike? Scientists offer new clues
An analysis of North America’s fossil record for the 18 million years before dinosaurs disappeared suggests the prehistoric ...
Extinctions of Australian mammals have long been blamed on foxes and cats—but where's the evidence?
In 1938, zoologist Ellis Le Geyt Troughton mourned that Australia's "gentle and specialized creatures" were "unable to cope ...