Is there water on Mars?
Mars is basically a desert planet with sand dunes, gravel and meteorites on its surface. The atmosphere dominated by carbon dioxide is thin and cold, and dust is suspended in it, and dust storms often occur every year. Mars has water ice and dry craters, volcanoes and canyons at both poles, including Mount Olympus, the second highest mountain in the solar system, and the largest canyon, mariner canyon. Another topographical feature is the obvious difference between the northern and southern hemispheres: the south is an ancient, cratered highland, and the north is a younger plain.
On September 28, 2015, scientists said that Mars has not only water at the poles that has solidified into ice, but also liquid water that only appears and flows in warm seasons. On the surface of Mars, scientists have a theory that salt water flows on some slopes during the summer. Water flowing on Mars will only appear during the warmest season on Mars, but will disappear in the rest of the year, the report said. This seasonal situation occurs because salt lowers the freezing point of water. Water is the origin of life. Since there is flowing water on Mars, is there any microbial life on Mars.
As early as early as March 2013, NASA's curiosity Rover found reliable evidence of the presence of water bearing minerals in Martian rocks adjacent to clay layers previously discovered by curiosity. "Curiosity" scientific team claimed that scientists analyzed the mudstone rock powder samples excavated by the rover, indicating that the ancient environment of Mars was suitable for the survival of microorganisms.
On July 25, 2018, AFP reported that the first liquid water lake was found on Mars. Scientists have found huge aquifers on Mars, raising hopes for life on Mars, the report said.
In October 2019, NASA said that the "curiosity" Mars Rover found deposits rich in mineral salts in the gale crater, indicating that there were salt lakes in the crater, indicating that the climate fluctuations have changed the Martian environment from once warm and humid to today's frozen and dry climate.