Mars. Is. WEIRD.

Mars is many things. It's cold. It's dry. It's spectacular.

It's also weird. Very, very weird.

At its south pole are a series of layered deposits, a huge region where nearly pure water ice mixed with dust and sand was laid down year after year eons ago. Wind erosion has carved this into beautiful terraces now. But when you zoom in, you see that there are regions where odd patterns dominate, an intricate and vast network of furrows, interwoven channels that stretch for many kilometers.

They're...