An Asteroid Wiped Out the Dinosaurs—Will We Be Next?

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The new issue of California magazine has an apocalyptic theme: “This is the End.” I chose to write about planet-killing asteroids:

… at some point, an asteroid measured better in miles than feet will come for us all. According to a 1994 study published in the scientific journal Nature, we stand a 1-in-40,000 chance of dying in a “cosmic impact.” That’s more likely than perishing in a tornado, and less likely than in an airplane crash. At least in theory, the world possesses the technology to both detect and counter this threat. But as things stand right now, the next big impact might play out much as Chelyabinsk did: a short, sharp, and entirely unexpected shock—only with casualties in the millions or even billions.

Franck Marchis, a former UC Berkeley astronomer who is now a principal investigator at the SETI Institute in Mountain View, says “It won’t happen tomorrow. But it will happen. It’s a matter of time.”

(Illustration by Andrew Archer.)