Mud-cracks on Mars confirm it had lakes like Earth: Study
A NASA study has confirmed that the polygon-shaped cracks discovered by Mars Curiosity rover in 2017 were indeed mud-cracks that formed in a drying lake some 3.5 billion years ago. "The cracks show that the lakes in Mars' Gale Crater had gone through the same type of cycles that we see on Earth," said a Caltech geologist. 