A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears.

University of Queensland scientists have helped to construct a detailed timeline for bacterial evolution, suggesting some bacteria used oxygen long before evolving the ability to produce it through ...

Bacterial evolution and oxygen adaptation: A timeline built from genomic, fossil, and chemical data. Colors show oxygen states: anaerobic (blue), aerobic (red), and proportion of aerobic lineages in ...

Bacteria, among the oldest of life forms, have lived in seemingly every possible habitat on the planet, from ocean trenches and mountaintops to hot springs and polar ice. Yet, they have left a limited ...

A digital reconstruction of a million-year-old skull suggests humans may have diverged from our ancient ancestors 400,000 years earlier than thought and in Asia, not Africa, a study found. The ...

A team from the University of Illinois has uncovered surprising evolutionary links between the genetic code and tiny protein fragments called dipeptides. By analyzing billions of dipeptide sequences ...

A newly described fossil from northern Australia reveals an 8 meter mega-shark that hunted in the age of dinosaurs, long before the famous Megalodon ever evolved. By pushing the origin of giant ...

New discoveries of fossil clawed footprints from Australia, published in Nature, push the origin of reptiles back in time by at least 35 million years and change the entire timeline for the origin of ...