An analysis of tooth enamel from animals that roamed the western United States about 150 million years ago, including (from left) Allosaurus, Apatosaurus, a herd of Diplodocus and two Camptosaurus, ...

Flash floods are occurring across the U.S., from Texas to New Jersey. Here is why flash flood risk is escalating, and how to protect yourself.

Here are all the tariffs, counter-tariffs, dealmaking, and deal-breaking between the world’s two biggest economies.