FOUR-ton mega-sloths with flesh-rendering claws lived alongside humans for 10,000 years, new research has found. The 20ft ...

New discoveries from several archaeological sites in North and South America suggest that ancient people first arrived in the ...

Research from several sites is starting to suggest that people came to the Americas earlier than once thought.

New discoveries from several archaeological sites in North and South America suggest that ancient people first arrived in the ...

But new research has found the sloth's bones had been turned into jewellery by humans that lived alongside them 27,000 years ago. One penny-sized sloth fossil appears to be deliberately polished ...

Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons) — and when startled, they brandished immense ...

Researchers at McMaster University discovered eight different sex chromosomes in 11 species of African clawed frogs, revealing surprising genetic diversity. The study found these chromosomes in genome ...

African clawed frogs are known for their flat bodies, vocal organs and claws on the first three toes ... of its close evolutionary relationship to humans, and because early development occurs ...