Evolution

Some organisms respond to stress by driving up their mutation rate. Are they evolving specific mechanisms to enhance evolution in times of crisis?

Mysterious episodes of genetic duplication in our great ape ancestors may have paved the way for human evolution.

Analyzing individual cancer cells could reveal the answer to some of the disease’s most enduring mysteries.

An interview with the developmental biologist Cassandra Extavour on the origins of multicellular organisms and the evolution of cooperation.

A computational study reveals surprising flexibility hidden within metabolic networks, providing new evidence for an evolutionary concept called exaptation.

Machine learning techniques are helping scientists pinpoint the mutations that allow bird and pig viruses to infect humans.

Population expansion may be a major driver in the evolution of cooperation, with implications for new antibiotics, cancer treatments and perhaps even human behavior.

Scientists are exploring how organisms can evolve elaborate structures without Darwinian selection.

Symbiotic bacteria that dwell within insect cells are intricately intertwined with their hosts, prompting scientists to question when these bacteria stop being bona fide organisms and become part of the cell.