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 ...

The competition draws hundreds of artists, from veterans to high school students, who compete to have their art featured on the stamp. This cute animal has raised over $1.2B through a nearly ...

Lawmakers considered the goldfinch. Kids liked the scarlet tanager best. The whole thing took more than three decades.