Saturn’s moon Titan is the only place beyond Earth where a person could stand outside without a pressure suit — its atmosphere is 50 per cent thicker than ours and blocks even the galactic cosmic rays that would make Mars lethal over time

Titan's dense nitrogen atmosphere supplies tolerable pressure and absorbs primary galactic cosmic rays before they reach the surface, but oxygen and extreme-cold protection would remain essential. The post Saturn’s moon Titan is the only place beyond Earth where a person could stand outside without a pressure suit — its atmosphere is 50 per cent thicker than ours and blocks even the galactic…