How long have the Martians been on the planet? How did it happen?

Martians have been here since before the humans, back in 1264 bc a scientist named Hank Crenshaw was starting a project but accidentally made humans. The species being a danger to all martians and mars itself. Was sent to a near planet named earth. To this day the martians still monitor human life.

A Martian is a native inhabitant of the planet Mars. Although the search for evidence of life on Mars continues, many science fiction writers have imagined what extraterrestrial life on Mars might be like. Some writers also use the word Martian to describe a human colonist on Mars.