Baboon bone was spotted by the American Museum of Natural History . The discovery is significant because it shows that baboons are capable of using tools to hunt and gather food. They say the baboon bone was somehow mixed up with Lucy 's remains . Lucy is oldest and most complete fossil of an early human ever found .
Baboon bone was spotted by the American Museum of Natural History . Researchers thought one of the vertebra bones was too small to fit Lucy . They say the baboon bone was somehow mixed up with Lucy 's remains . Lucy is oldest and most complete fossil of an early human ever found .