Stick insects that reproduce asexually cannot adapt as quickly in the course of evolution as sexually reproducing species, leading to a decrease in biological diversity, according to new research. An ...

Biologists are uncovering increasing evidence that females are much more than passive players in the game of reproduction. Examples include ducks with labyrinth-like vaginas that open or close to dead ...

A soft-bodied, fernlike creature reproduced in Earth's ancient oceans about 565 million years ago, making it the earliest known example of procreation in a complex organism, a new study finds. Many ...

Recent changes in the distribution of the Welsh language are related to a process of empowerment of a Welsh-speaking elite that has come into being as a consequence of economic change, especially ...