men have been on space for 300000 age
earth is over_400_million_years_old. middle_aged_man is man. phase_space is space. find_outer_space is man_made_sattelites. age is period_of_existence. boy_wonder is male. male_infant is male_young_human. pyramids_of_egypt is over_4000_years_old. space is time. space_age is time.