But sometimes I have to cut a sandwich or pizza in half. If the other person is equally hungry, they'll be scrupulous about ...

Roger Camp of Seal Beach, Calif., is a poet, blues pianist, photographer and orchid enthusiast. When he’s not at home, he’s photographing in the Old World. His work has appeared in Spillway, Slant, ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www.springernature.com/us). Scientific ...

Robert Ghrist is a mathematician at the University of Pennsylvania. He works in applied algebraic topology and creates animations and visualizations of mathematics.

If NASA’s ambitious lunar exploration plans succeed, scientists will cover the moon with sensors—and find answers to several ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...