Warm air rises, but it also expands because air pressure decreases with height. The latter effect wins out and air becomes ...

The warming hole might be a sign that Atlantic Ocean currents are slowing down. This network of currents regulates Earth's ...

a more disorganized polar vortex leading to sudden cold snaps fueled by icy northern air pushed toward the equator. "As the ...

Astronomers have spent decades trying to find Earth-like planets beyond our solar system. These worlds are small, cold, and difficult to detect, especially when they lie in the "temperate zone"—the ...

When the daughter of a celebrity couple is kidnapped it appears to be the work of a serial killer who has struck twice before. The truth is much more terrifying.