Long before David Blaine, there was the mimicry of the tiger moth—it avoids bats by emitting an ultrasonic signature similar to that of a noxious species. Long before that, some physicists say, an alien civilization launched an intricate simulation of reality, which we currently inhabit. Even if that hypothesis is false, don’t we entertain our own illusions every day, from free will to free markets?

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Celebrating the Relationship Between Science and Illustration
A conversation with Society of Illustrators executive director Arabelle Liepold. -
The Extraordinary, Imperiled Science at the End of the Earth
Firing experts in Antarctica couldn’t come at a worse time -
Breaking a Cycle of Apocalypse
John Larison’s new novel The Ancients suggests some societies are built for cataclysm -
An Earthy Fallen Star
The strange mushroom that puffs life into forests around the world. -
Inside an Exploded Star
Cassiopeia A gets a close-up.