Did you know Mars may once have had an ocean? 🌊 Scientists believe that billions of years ago, over 20% of Mars’s surface—the planet’s northern plains - may have been covered by a vast ocean. It wasn’t shallow either: estimates suggest it reached nearly a mile deep, reshaping the planet’s landscape. Ancient shorelines, massive valleys, and water-formed minerals point to a Mars that once looked dramatically different. Understanding this watery past helps scientists trace how the Red Planet chang

Scientists say they have found evidence of an underground body of water on Mars. Read more: https://nbcnews.to/2NLJhOd | NBC News Science