The Red Planet was wet until abruptly it wasn’t. Researchers have long observed dry riverbeds carved across Mars’ surface as proof that water once streamed liberally on the planet. And Curiosity rover of NASA in 2012 transmitted back pictures of smooth, round pebbles from the one such riverbed’s bottom, the absence of their rough edges prove that water had once streamed over them. A new study issued in the Science Advances journal lists those rivers and mentions that their waters probably ran heavily well into the final period before Mars completely withered.
If the rivers had been short or ran only fraction of the time, it would still have been difficult to elucidate their subsistence. However, researchers just don’t recognize where all the liquid water emerged from to create these heavy streams. At present, Mars is frosty and mostly arid, with merely a slender atmosphere on its surface. In the remote past, it appears that the conditions should have been even colder, as the sunlight getting to the surface of the planet would have been dimmer. And still, water appears to have run heavily and generously across the planet billions of years ago, in rivers that were at times broader than those on Earth. The waters seem to have streamed so profoundly that they would have been in activity all day, not merely in thin trickles or at peak sunlight hours.
Researchers stated that this work signifies that something in the existing science of the early solar system and planets is erroneous, as everything researchers recognize propose that the rivers on the Red Planet should have been temporary and small, if they subsisted at all. The heavy, long-term flows renaming for millions of years, just do not fit into existing scientific knowledge.
On the other end, when the Mars 2020 rover touches down on Mars in early 2021, it will ferry with it a tiny helicopter, the foremost human craft to soar on another planet.