Study of 280 empirical papers suggests evolution is shaped by both individual advantage and competition between groups.

The Universitat Autònoma de Barcelona (UAB) forms part of an international consortium that is preparing the Tree of Sex project, an ambitious initiative aimed at decoding the evolutionary complexity ...

For a long time, having children has been a young person’s game. Although ancient records are sparse, researchers estimate that, for most of human history, women most typically conceived their first ...

Biologists like to say that reproduction is the ultimate investment, a costly gamble that shapes everything from lifespan to behavior. Yet a small shark patrolling shallow reefs has just upended that ...

Imagine a photograph of your great-grandparents, grandparents and parents side by side. You’d see a resemblance, but each generation would look distinct from its predecessors. This is the process of ...

In the debate over human origins and the nature of sexual reproduction, religious and scientific perspectives often diverge. The Bible claims man came first, with women derived from man’s rib. Yet, ...

Add Yahoo as a preferred source to see more of our stories on Google. Unfurling fiddlehead of the Christmas fern (_Polystichum acrostichoides_). Jacob S. Suissa, CC BY-ND Imagine a photograph of your ...