Analysis of ancient footprints, which experts were calling Trisauropodiscus, suggest these creatures were likely to have been three-toed.

Fossilised footprints discovered in New Mexico indicate that early humans were walking across North America around 23,000 years ago, researchers said. The first footprints were found in a dry lake bed in White Sands National Park in 2009.

Fossilised footprint tracks which have been dated to 58 million years ago may represent the earliest evidence of mammals gathering by the sea, researchers say.The findings suggest mammals may have first used marine habitats at least 9.4 million ...