The Star In You
Just what do astronomers mean when they say we're all made of star stuff?
Galileo's refractor and Newton's reflector remain the two standard types of optical telescopes today.
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.
Forecasting Volcanic Eruptions
How good are we at predicting when an active volcano will next blow its top?
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.