We are surrounded by a constantly changing magnetic field, be it Earth’s or those emanating from devices, such as cell phones. Scientists are interested in understanding how these magnetic-field fluctuations change biochemical reactions inside us.

The first study of how mammals in North America adapted to climate change in “deep time” found that families with greater diversity were more stable and maintained larger ranges than less diverse families.

Corn, America’s No. 1 crop, could see its prime growing region shift to the Canadian border or its price volatility increase sharply within 30 years. A new study points to climate change as the cause.