BLA2597

5. Fight fire with fire, and data with data.
[|Dinosaur Treks]

Why did the dinosaurs become extinct? What happened over 65 million years ago to kill a species that had survived for 150 million years? The answer is that no one knows for sure, but everyone seems to have their own favorite theory. Whatever caused the death of the dinosaurs also caused the death of about 70% of all of the species on the Earth. Now we'll introduce just a few of the popular theories dealing with the dinosaur extinction at the the end of the Cretaceous Period.