By 1957, scientists had a significantly more sophisticated understanding of influenza, worrying them that a pandemic similar ...

Sixty-six million years ago, at the end of the Cretaceous Period, an asteroid impact near the Yucat n Peninsula of Mexico triggered the extinction of all known non-bird dinosaurs. But for the early ...

In 1992, a paleontologist unearthed the fossil of a prehistoric bird called "Vegavis iaai" in Antarctica and hypothesized that it was an early relative of today's ducks and geese. However, because the ...