 Currently no mice or rats have developed while in microgravity throughout the entire developmental cycle.The 2suit (alternately "2-Suit" or "twosuit") is a garment designed to facilitate low-effort sex in the weightless environments such as outer space, or on planets with low gravity.The flight garment, invented by American novelist Vanna Bonta, was one of the subjects of "Sex in Space", a 2008 History Channel television documentary about the biological and emotional implications of human migration and reproduction beyond Earth.