This was
your sky.

Collapse in Hebes Chasma on Mars

Hebes Chasma, a depression on Mars, holds a 5-kilometer-high mesa called Hebes Mensa. The mesa shows signs of an unusual partial collapse. Since the chasma is isolated, scientists are trying to figure out where the collapsed material went. The European Space Agency's Mars Express spacecraft captured this image, which offers clues about the event.