![Scientific American Magazine Vol 322 Issue 1](jpg/154469ca-8480-4580-8033e367ffd23345_sourcec6eb.jpg)
Volume 322, Issue 1
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Features
Why Your Brain Needs Exercise
The evolutionary history of humans explains why physical activity is important for brain health
Quantum Slits Open New Doors
An update to the classic “double-slit” experiment paves the way toward a novel strategy for quantum computing
"Birdbrain" Turns from Insult to Praise
Some avian species use tools and can recognize themselves in the mirror. How do tiny brains pull off such big feats?
How to Break the Bonds of Opioids
Many chronic pain patients can be slowly tapered from the drugs without increasing misery
Alone in a Crowded Milky Way
Even a galaxy teeming with star-hopping alien civilizations should still harbor isolated, unvisited worlds—and Earth might be among them