A new study found that microgravity simulated on Earth hindered sperm cell movement, egg fertilization and embryo development ...

A new study suggests humans face barriers to reproducing in space, with microgravity disrupting sperm movement.

Knowing which way is up helps sperm find their way to an egg, new research indicates, and they struggle without the guidance ...

The vision of Mars colonization is moving from science fiction into real-world planning, with multiple space agencies preparing for long-term human presence. Modern Mars missions focus on testing ...