"Ancient humans" used toothpicks nearly 1.8 million years ago, a study of their teeth has revealed.

A team studied hominid jaws from the Dmanisi Republic of Georgia - the earliest evidence of primitive humans outside Africa.

They also found evidence of gum disease caused by repeated use of what must have been a basic toothpick.

Writing in PNAS, the team says its findings help to explain the diversity found in hominid teeth....