Is Ganymede alive?

Since water was found on Mars, do Martians exist?

since the 199s, human beings have always believed that Mars is the most likely planet with life in the solar system, and the basic condition for life is liquid water. The National Aeronautics and Space Administration (NASA) announced on the 6th that the "Mars Reconnaissance" probe launched 1 years ago took photos of the same place on the surface of Mars at different times and found new alluvium, which indicates that liquid water may exist on the surface of Mars in recent years. The results show that there is not only water but also liquid water on the surface of Mars. When the water is the largest, the amount of water collected between gullies is equivalent to the size of 1 swimming pools! This has further stimulated people's speculation about the existence of life on Mars.

There is water flowing in the ravine of Mars

On the 6th local time, Kenneth Edgette, the chief scientist of Marin Space Science System Center in San Diego of NASA and the head of the space camera project of Mars Reconnaissance, announced that he would bring out a "smoking gun" to prove that there is liquid water on Mars now!

Edgette said humorously to reporters, "Actually, what we are going to serve is a water gun!"

Edgette said that the research results of him and his colleagues were published in Science magazine published on the 8th. By comparing the photos taken on the surface of Mars in the last seven years with the images sent back by the "surveyor around Mars", it was found that 2 places were newly formed, some of which can be concluded that meteorites hit the surface of Mars, while the other part was formed by "liquid water flowing down the pit wall".

Edgette and his colleagues found that new "bright and light alluvium" appeared in the two gullies in 1999, 21, 24 and 25, which stretched for hundreds of meters. Edgette and his colleagues think: "These alluviums are the same shape as the current alluvium. They have finger-like branches at the lower end of the slope wall, and it is easy to change direction when encountering small obstacles."

These findings are not direct evidence of the existence of liquid water on the surface of Mars. Edgette explained that although quicksand on Mars will also cause similar surface phenomena, the difference between them is that the gully formed by quicksand is "dim" in the photo, and only the gully formed by flowing water has the characteristics of "bright light color".

There is not much water on Mars

Edgette admits that because there is no air and no clouds on the surface of Mars, liquid water will not be preserved on the surface of Mars for a long time, and will soon freeze into ice or evaporate.

However, this is enough to support the view of some scientists before: there is shallow liquid water on the surface of Mars, which will overflow the surface of Mars from time to time to form rivers, lakes and pools. However, with the disappearance of clouds on Mars, these liquid waters are getting less and less, and finally only these "swimming pools" are left.

"Of course, we don't know if this water can be drunk. It may be acid water, salt water or mud, but it must be H2O!"

Best for life

Mitchell Ley, chief scientist of NASA's Mars exploration project, said: "These photos are irrefutable evidence that the surface of Mars has been flowing sometimes until now. The biggest question now is: how did all this happen? Is it directed at life on Mars? "

The scientists who specialize in the research of extraterrestrial life are very excited by the latest discovery, because once this discovery is completely confirmed, the two direct conditions for life: liquid water and stable heat source will be solved, and Mars has become the most suitable planet for life discovered by human beings so far.

in the mission of exploring Mars, NASA has always followed the "water-seeking strategy", because only when water is found can we determine whether there was life on Mars or whether there is still life now.

Scientists agree that ancient Mars was once rich in water resources, and now there are ice-like water in the Arctic and Antarctic of Mars, but they have not found any evidence of liquid water before. Bruce edin dzeko, an astrobiologist at the University of Colorado, said: "The latest discovery has increased the need to find past and present life on Mars."

scientists also believe that as long as this discovery is confirmed, there is liquid water in a certain area or more of the surface of Mars, then the dream of human beings living on Mars will come true. As long as human beings stand on Mars, the chances of finding life on Mars, "Martians" and even life bosom friends on other planets in the universe will be multiplied.

There is always a collision between heaven and earth

Of course, water is only one of the necessary conditions for human beings to live on Mars, and if they really want to live on Mars, they will face a lot of danger.

The photos of the same period show that "the collision between heaven and earth" often occurs on the surface of Mars, and two-thirds of the 2 newly formed gullies are formed by the violent collision of comet fragments with the surface of Mars. According to scientists' estimation, if humans can really live on Mars in the future, they will encounter a "big collision between heaven and earth" every 2 years on average-they may directly hit the "Martian residential area", or they may pass by, and then they will bump into a large area of dust, and it will be very dark.