Is it possible that humans once lived on Mars?

NASA wants to send humans to the red planet by 2030, and SpaceX wants to get there even sooner, with plans to have people there by 2024. read more

Yes, it is possible that humans once lived on Mars. Mars could over been like Earth millions of years. The sun rays could of stripped away the atmosphere of Mars killing all life on their (if their was any). One day Earth may be like Mars. read more

Furthermore, the same research also indicates that the ancient, primordial surface of Earth would've been inhospitable to the formation of the building blocks of life (RNA, DNA, and proteins) -- therefore, the only way that life could've begun more than three billion years ago is if it arrived here from Mars. read more