Say hello to your oldest mammal ancestor

Scientists believe they've identified the common ancestor that links human beings with all other placental mammals: a rat-sized creature that lived on insects.

Earliest human ancestor discovered

British and canadian researchers have confirmed that a 505 million-year-old creature is the most primitive known vertebrate - and therefore the ancestor of us all.

Well-preserved fossils could be earliest human ancestor

Researchers say they've discovered a 'missing link' - a hominid 1.8 million years old that may be our oldest direct human ancestor yet found.

Say hello to granny

Paleontologists have unearthed the fossilized remains of a creature that they say may be the ancestor of all placental mammals on Earth today.