‘Bathtub ring’ offers new evidence for Mars ocean billions of years ago

AI Summary

Scientists have found new proof that Mars may have once had a huge ocean. This ocean could have covered about one-third of the planet. Billions of years ago, the water dried up. Now, scientists see a flat area that looks like a "bathtub ring." This ring is a sign of where the ocean used to be. This finding helps us understand Mars's past.