The fabella disappeared from our lineage millions of years ago, but over the last century, its presence in people’s knees has become more common.

Meet some of the people featured in the April 2019 issue of The Scientist.

The study of evolution requires consideration of organisms’ microbiomes.

If the structures identified in a 2.1-billion-year-old rock are really signs of burrowing organisms, it would push back the earliest known mobile organisms by 1.5 billion years.

The Indiana University professor was known for his research on the evolution of organismal development.

Human endogenous retroviruses that colonized vertebrate DNA millions of years ago have long been dismissed as junk DNA, but researchers now know that they may play important roles in cancer, neurodegeneration, and other ailments.

Urban environments are driving genetic changes in resident species through multiple mechanisms, from establishing gene flow barriers to exerting novel selection pressures.

From changes in gene flow to adaptation, the effects of urbanization are shaping the evolutionary trajectories of plants and animals.

The exaggerated horns and elongated forelegs of male flower beetles, which use these appendages as weapons in combat for females, do not slow down the insects in a race.