Why is there no one on Mars?

1. The reason of Mars itself: (1) There are about 95% carbon dioxide and very little oxygen in the atmosphere of Mars, which is not suitable for human breathing.

(2) The atmospheric pressure of Mars is extremely low, which is lower than the top of Mount Everest.

(3) No liquid water has been found on Mars.

(4) The temperature on Mars is much lower than that on Earth. The average annual temperature on the surface of Mars is only -55 degrees Celsius, which is too cold for human survival.

(5) There is an asteroid belt between Mars and Jupiter, so the probability of an asteroid hitting Mars is much greater than that of hitting the Earth.

2. Man-made reasons: human space technology has not yet developed to the step of manned space landing on Mars, let alone emigrating to Mars.

3. Even if there are advanced intelligent creatures similar to human beings on Mars, the physiological structure of advanced intelligent creatures produced in the specific environment of Mars is definitely very different from that of our earthlings and cannot be defined as human beings from the biological point of view.