Cloud seeding does not create clouds or precipitation from clear skies. It can only be effective when clouds with the right structure and moisture are already present. For that reason, cloud-seeding ...

The white streaks that crisscross the sky have become a Rorschach test for a polarized era. To some, they are proof of a ...

If you’ve ever looked up at a mostly blue sky and seen straight white lines criss-crossing the horizon, or watched a plane puff out a plume as it passed above, you may have wondered, “what causes that ...

SINGAPORE – The white streaks left by planes as they zip through the skies make a pretty sight, but they can harm the planet ...

Most of us first spot them as children—the white lines in the blue sky that are the telltale sign of a flight overhead. Contrails are an instant visual reminder of air travel, and a source of much ...

If you've ever stared up at the sky and wondered about the long, white streaks emerging behind airplanes, you're definitely not alone. These ghostly lines are called contrails, short for condensation ...

Some contrails can contribute to global warming. Contrails—pure ice clouds (“cirrus”) that form from aircraft exhaust under specific cold conditions—can trap heat in the atmosphere, sometimes creating ...

Clouds come in all types, shapes and sizes. It can be used to determine current and future weather conditions just by looking at the sky. Clouds were studied and named by Englishman Luke Howard in the ...

JACKSONVILLE, Fla. – The sunrise never quite made its grand entrance over the First Coast Thursday morning. Instead, a thick blanket of clouds kept the sky in shades of gray. But while we couldn’t see ...