Animal mimicry takes many forms—including chemical and acoustic varieties—and offers unique insights into evolution
By the latest estimate, the observable universe contains 200 billion galaxies. Astronomers wonder: Why so few?
Our bodies adjust to the cycle of day and night thanks to specialized neurons in our eyes. Ongoing study of these cells could lead to new treatments for winter depression and other conditions
A forgotten number system invented in the 19th century may provide the simplest explanation for why our universe could have 10 dimensions
A fancy cosmic-ray detector, the Alpha Magnetic Spectrometer, is about to scan the cosmos for dark matter, antimatter and more
Pigweed, ragweed and other monsters have begun to outsmart the advanced technologies that protect the biggest U.S. cash crops
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