For all the ambition packed into humanity's plans for Mars colonies, lunar bases, and permanent off-world settlements, one fundamental question has quietly gone unanswered: can humans actually ...

China's Tianzhou-10 mission just delivered embryo-like structures made from living stem cells to the Tiangong space station. Experiments could shed light on how radiation and microgravity affect human ...

China has become the first nation to send human artificial embryos into orbit, aiming to uncover how space conditions like ...

WASHINGTON — A new report from the National Academies of Sciences, Engineering, and Medicine identifies the highest priority science objectives for the first human mission to Mars, and says searching ...

Dedication; Foreword; Preface; Acknowledgments; About the Author; Introduction; Section 1-Life and Its Diversity; Structure and Function; Life Processes and Needs of Living Things; Section ...

Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo. An embryo develops into an unborn baby in the uterus during pregnancy.