Volume 22 Issue 5
The Sluggish Race to Guard the Earth Against Meteors
In the last two decades NASA reported nearly 600 exploding meteorites, many as large as 60 feet, rattling the thermosphere like dynamite. Is anyone worried about that?
Seven Projects Pushing the Boundaries of Biology
For millennia, humans have altered our planet by clearing land for cities and agriculture, hunting animals into extinction, and introducing invasive species into vulnerable ecosystems. What's our next trick going to be?
The Baffling, Gruesome Plague That Is Causing Sea Stars to Tear Themselves to Pieces
"They twisted their arms together," a marine biologist said, "and they'd pull and pull and pull, until one of them came off... It was horrific."