Artwork of dust devils on the surface of Mars. Dust devils are tall and short-lived whirlwinds. They form when a pocket of hot air near the surface rises quickly through cooler air above it to create an updraft of rotating air. Dust devils were first...

Artwork of dust devils on the surface of Mars. Dust devils are tall and short-lived whirlwinds. They form when a pocket of hot air near the surface rises quickly through cooler air above it to create an updraft of rotating air. Dust devils were first...

Artwork of flying or floating alien creatures above the clouds on a massive terrestrial planet. Very massive rocky planets are expected to have such dense atmospheres that life on the ground could be virtually impossible owing to the great pressure o...