Dinosaur extinction dated to a 1000 years

Researchers from Glasgow University were part of an international team that has been investigating the demise of the dinosaur.

By using dating techniques on rock and ash samples, they established the creatures died out about 66,038,000 years ago - give or take 11,000 years.

We suggest that the brief cold snaps in the latest Cretaceous, though not necessarily of extraordinary magnitude, were particularly stressful to a global ecosystem that was well adapted to the long-lived preceding Cretaceous hothouse climate. The Chicxulub impact then provided a decisive blow to ecosystems thus already under critical stress, and in essence pushed the global ecosystem across a threshold that triggered a planetary state shift.