Answer is Orrorin tugenensis
Orrorin tugenensis also called the Millenium Man lived in the Eastern Africa, specifically in Tugen Hills, central Kenya about 6 million years ago. These species were the size of a chimpanzee and had small teeth with thick enamel similar to humans. Evidence showed that the most important fossil found is the upper femur, was having a bone buildup typical of a biped, indicating that these individuals climbed trees but walked upright with two legs on the ground.
