Learn about Viking women, doughnuts in the brain, nuclear weapons, and more in the October issue of Scientific American
Do you have a favorite place to go where you can see the Milky Way? I can't see it from my house, but if I trespass on a nearby public golf course , I can get a good look at our galaxy, as well as any comets that are just visible to the naked eye. Have you ever looked at Saturn or Jupiter through binoculars and seen their moons? You can see them if you keep your hands steady enough and if—if, if, if—the sky is dark enough.
Astronomers raised the alarm about light pollution—they, like anybody looking up through wobbly binoculars, need dark skies to get a good look at the rest of the universe. Biologists have discovered that light disrupts wildlife in profound ways. Excess light is a waste of energy, and light pollution might harm human health.
Recognizing patterns is one of the things that humans can generally still do better than algorithms. Mathematician Kelsey Houston-Edwards details how algorithms based on topology, or “squishy math,” can help identify patterns in all kinds of data, including doughnuts in the brain.
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