The Star In You
Just what do astronomers mean when they say we're all made of star stuff?
End of the Big Beasts
Overhunting, climate change, disease, and now a comet. What did kill off the megafauna?
A Potpourri of Pooches
How come dogs, alone among Earth's species, come in so many shapes and sizes?
Surviving a Supereruption
What could we expect if one of these volcanic megablasts were to occur today?
Bitten By the Bug
What lies behind fossil-bearing amber's fascination? Hear from one newly minted aficionado.
America's First Lady of the Air
Harriet Quimby was the first woman to fly the English Channel solo—and that's only part of her remarkable story.
How Fuel Cells Work
You need some hydrogen, some oxygen, a special membrane, a couple of catalysts, and presto—you've got power.