“China has become the first nation to send ‘human artificial embryos’ to space in a bid to better understand how microgravity and cosmic radiation may affect human reproduction. The results could have big implications for our ability to set up self-sustaining colonies on the moon and Mars…

The artificial embryos are made from collections of stem cells that can divide and multiply like a normal embryo but are unable to properly develop into a fetus or baby, allowing researchers to carry out their work with fewer ethical concerns…

The embryos will be allowed to grow for five days before they are frozen and later returned to Earth for analysis.”

From Live Science.