Hot air rises, cold air sinks. It’s a basic tenet of nature. Because it sinks, cold air often finds depressions or low-lying terrain, like a valley or basin, in which to collect, particularly at night ...

Researchers used remotely-piloted sailboats to gather data on cold air pools, or pockets of cooler air that form when rain evaporates below tropical storm clouds. These hard-to-study phenomena are ...