Roundheaded gullies slice into that same smooth layer, while strange tongues of who-knows-what lap at the slopes beneath them. Landscapes like this are changing the way geologists look at Mars.

In that scenario, flows resulting from this process could have etched gullies and other surface features ... to the main asteroid belt between Mars and Jupiter to orbit Vesta for 14 months and ...

Mars once hosted a lake larger than any on Earth ... The smaller crater to its south (left) has been eaten away by small gullies on its northern (right) flank, while the rightmost part of the ...

Studying gullies is one way to avoid a research rut. Rodriguez, J.A.P. VC Gulick, RL Santiago, MZ Hernández, AG Fairen, VR Baker, T Platz, JS Kargel, Y Jianguo, N Glines 2015. Flooding in Highly ...