Symmetry, on first glance a mere detail of arrangement, has unexpected powers, aesthetic, practical—even moral. We find it in physics, families, and the brain. As shorthand, it heightens our powers of observation, helping us recognize faces and calculate particle interactions. As organizing principle, it steers genes and galaxies. Scientists, long ago convinced that it is mixed into the truth of things, flock to it.

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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.