This is the second lower molar of a modern human found in Bacho Kiro Cave in Bulgaria that was associated with tools from Initial Upper Palaeolithic about 45,000 years ago.
This photo captures the Ewass Oldupa archeological site in the Oldupai Gorge, Tanzania. Stone tools that date back 2 million years ago were recently uncovered at the site.
This image shows the Cook House (right) and the Earthwatch roundhouse reconstructions (left) prior to their dismantling and excavation at the Castell Henllys Iron Age site in Wales.
This is an artist's illustration of Adalatherium hui, an early mammal that lived on Madagascar 66 million years ago.
This artist's illustration shows Triceratops and juvenile tyrannosaurs facing off near the end of the Cretaceous Period 67 million years ago.
This mastodon fossil is on display at the American Museum of Natural History. A new study using mastodon DNA has suggested the animals migrated many times across North America during fluctuations in climate and environment.