Life on Mars
Scientists speculate that the environment before Mars is very likely to be able to give birth to life, but their long-term research on Mars has not yet found a specific form of life. At present, scientists only doubt this. Only after conclusive evidence is found, can the existence of life on Mars be announced to the world, otherwise no one can prove that there must be life on Mars.
In further research on Mars, scientists accidentally discovered that humans are very likely to bring life from Earth to Mars, and carrying life through spacecraft is the basic way they guess. We must know that the sterilization of spacecraft is not as easy as imagined, at least judging from the current level of human sterilization, it is still impossible to eliminate 100% of microorganisms. Microorganisms are very likely to be attached to spacecraft and brought to Mars, but this statement has also been refuted by some scientists. They believe that the existence of Martian water ice can well prove that life can be born on Mars.
Water ice substance
Scientists have discovered a large number of water ice substances on Mars. Although they cannot prove the existence of liquid water, their discovery of water ice substances at least proves that the Martian environment is very different from their previous expectations. Human beings' in-depth research on stars is conducted on the spot through advanced detectors. Now the probe launched by China has successfully landed on Mars and started its observation mission to Mars. I believe that it won't be long before we have a deeper understanding of Mars, so as to determine where Martian life forms come from. Perhaps, as many people have speculated, there are indeed life forms on Mars, but we have not discovered them before.