A rare martian delta in Eberswalde crater.
Image credits ESA/DLR/FU Berlin (G. Neukum).
ESA’s Mars Express has spotted a rare case of a crater once filled by a lake, revealed by the presence of a delta. The delta found at Eberswalde crate is an ancient fan-shaped deposit of dark sediments, laid down in water. It is a reminder of Mars’ past, wetter climate. (read more)