Asked by: Johnathan Holmes, Bristol
Only one bird has ever actually laid an egg in space. A quail aboard the Russian Soyuz TM-10 spacecraft laid an egg while travelling to the Mir space station in 1990. It seems likely that other birds would be able to physically lay eggs in zero-g, but successfully incubating those eggs is much harder. Experiments with both quail and chicken eggs in space show much higher rates of birth defects in the bird embryos.
Luis trained as a zoologist, but now works as a science and technology educator. In his spare time he builds 3D-printed robots, in the hope that he will be spared when the revolution inevitably comes.