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Mars
Elon musk is planning to send people from Earth to Mars and is planning to set up a colony there. There were traces of human life on Mars when NASA saw various footprints on the surface of Mars. Now the question remains as to from where these footprints came from and which creature footprint could it be. Scientists are capturing dark and extensive streaks near the surface of the planet that only show up during warm season of the planet. Mars really holds some dark secrets about life, given it is derived from earth. These mysterious things are expected to be solved soon as we wait.
