China has launched artificial human embryo models into space in a groundbreaking attempt to understand whether humans could someday reproduce beyond Earth.⁠ ⁠ The tiny structures are not real embryos and cannot grow into babies. They were created from human stem cells to imitate the earliest stages of human development, giving scientists a way to safely study how life begins in the harsh environment of space.⁠ ⁠ The samples were carried to China’s Tiangong space station aboard the Tianzhou-10 mission. Once in orbit, researchers allowed them to grow for five days inside special chambers designed to recreate important moments in early pregnancy.⁠ ⁠ One group of samples mimicked implantation, the stage when an embryo attaches to the uterus. Another recreated gastrulation, a crucial phase when cells begin organizing into the tissues and organs that eventually form the human body.⁠ ⁠ At the same time, identical samples remained on Earth so scientists can compare how the space-grown structur...