If clouds are heavy, why don’t they just fall to the ground? There’s one key concept behind this. Meteorologist Robb Ellis explains.

These artificial clouds are produced by releasing chemical compounds from high-altitude probes, typically at elevations between 80 and 400 kilometers above the Earth’s surface.

Each scene is made more intense by lasting only moments. Smilde's creations in gallery spaces include a sky-grazing cloud at the De Groen Fine Art Collection in Arnhem, the Netherlands.

“Even though the sun has set in Gale Crater, the clouds are high enough in the atmosphere that the sun still shines on them, making them seem to almost glow in the sky,” wrote Alex ...

Wednesday will be similar to today with the chance for some low level cloudiness filtering the sun and high clouds in the sky. The mercury in the thermometer is expected to reach the low 50s in ...

TAKAHASHI, Okayama Prefecture--A university lab is providing artificial intelligence-based probabilities on whether a sea of clouds will form around the “mountain castle in the sky” here.