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 ...

That's the way one scientist puts it — referring to how infected wild birds survive long enough to spread it to birds and ...

Europe is home to some of the world's most beautiful cities, but there are also some hidden dangers there that travelers need ...