Over a single day, in the placid waters of a single pond, a million virus particles might enter a single-celled organism known for the minuscule hairs, or cilia, that propel it through those waters.

Serially cloned mice hit a genetic “dead end” by generation 58, underscoring that sex evolved for variation, purging harmful ...

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 ...

The life sciences focus on patterns, processes, and relationships of living organisms. Life is self-contained, self-sustaining, self-replicating, and evolving, operating according to laws of the ...

New research finds that sexual reproduction and multicellularity drive diversity among different species. There are huge differences in species numbers among the major branches of the tree of life.