The lay of the land shapes the diversity of groundwater-dependent salamanders.

South American hummingbird males were caught on camera poking and pinching each other with bills adapted for fighting.

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

A study of tiny monkey skulls and teeth suggests that shrinking body size didn’t crowd out wisdom teeth during evolution.

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.

Clinical trials that target human endogenous retroviruses to treat multiple sclerosis, ALS, and other ailments are underway, but many questions remain about how these sequences may disrupt our biology.

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

A demographer’s model suggests the “mortality plateau” in the extreme elderly could be explained by clerical errors. Not everyone agrees.