We started walking on two legs between 6 million and 4 million years ago, tool-making began 2.5 million years ago, and our brains grew dramatically between 2 million and 1 million years ago.
We became bipedal walkers over 4 to 6 million years ago.
We never evolved to walk on two legs.
A person is outdoors.
Hamilton College is about 120 miles to the south of me.
There is more than one lab we can send things to.
A man in yellow inspecting his shorts.
The men are asleep.
The child is annoying the large alligator.