Early signs of a possible La Niña fall and winter are emerging in some climate models, federal forecasters announced Thursday July 10.

In 1862, Charles Darwin predicted the existence of a moth with a long tongue based on a comet orchid's nectar spurs. This was confirmed in 1903 with the discovery of a long-tongued hawkmoth, ...

A potentially strong El Niño weather pattern will likely emerge this summer and persist through the rest of the year. The hottest years on record generally occur in years when El Niño is active.

At any given time, about two-thirds of Earth's surface is covered by clouds. Overall, they make the planet much cooler than it would be without them. But as Earth gets warmer, mostly due to the rise ...