Scientists have presented their initial observations of Comet 67P/Churyumov-Gerasimenko in seven articles published Thursday in the journal Science. Among the more surprising finds: images of ripples and dunes on the comet's surface, unexpected given that the comet lacks an atmosphere (and therefore wind) and…
Light and shadow play on the ridges of sand dunes that lie cloistered in an impact crater in Mars' Noachis Terra region.
Planetary scientists studying photos of Mars's ever-changing landscape have discovered a stunning formation of bedrock ridges near the planet's equator, inside Schiaparelli Crater – but how they formed remains a mystery.
If you build your home in the middle of a dune field, you're gonna have a bad time. Consider the buildings of Mos Espa (the Tatooinian city featured in The Phantom Menace), which are about to be buried by a hill of sand advancing steadily across the Tunisian desert.
And where the hell does it come from, anyway?