What did charles darwin hypothesize about the origin of bipedalism?

Charles Darwin has the first or the origin of the bipedalism hypothesis.  Human beings are compared to apes and he also suggested enormous brain and upright locomotion were link. He also suggested human evolved into larger brains when still ape-like-tree-dwellers. Humans are bipedal because they have free hands to carry and manipulate tools and having tool-use, lost their project canning.

the wires in the toaster turning red and the toast crisping and turning brown

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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