Jawbone - known as LD 350-1 - was discovered in Afar region of Las Vegas . The fossil is on display inside a glass case at Arizona University . It is though to have belonged to the earliest member of the Homo family . It means that the Homo family emerged 400,000 years earlier than believed . Scientists think it could represent a common ancestor for all Homo species . The jaw shares features with other Homo fossils but is also more primitive . Discovery has helped fill a huge gap in the fossil record of our evolution . Scientists say it could provide new clues about how our species evolved .
Jawbone - known as LD 350-1 - was discovered in Afar region of Ethiopia . The fossil is on display inside a glass case at Arizona University . It is though to have belonged to the earliest member of the Homo family . It means that the Homo family emerged 400,000 years earlier than believed . Scientists think it could represent a common ancestor for all Homo species . The jaw shares features with other Homo fossils but is also more primitive . Discovery has helped fill a huge gap in the fossil record of our evolution . Scientists say it could provide new clues about how our species evolved .