For years people have been telling us the dinosaurs were killed off in an extinction event 65 million years ago. That always seemed a little too even for me. Did they round off, or was there doubt, or what? Now, thanks to a really good piece of detective work reported by Paleoblog, we know it occurred 65.95 million years, give or take 40,000 years, last Thursday.
The authors of the study also date the Chixulub impact that age, reinforcing the theory that the asteroid collision killed them all off, and not volcanic eruptions or anything. Paleoblog also gives the link to the paper.