Sperm may lose their ability to navigate in microgravity, raising new questions about whether human reproduction is possible ...

While space agencies are making significant preparations for long-term missions to the Moon and Mars, a fundamental human ...

Ducks with corkscrew penises, fish changing sex – what do we really know about sex and reproduction on Earth? Less than we ...

If you've ever had a spiny leaf insect as a pet, or you're considering getting one, hopefully someone has warned you about this: if you put one in your enclosure, you might come back some time later ...