there are other scholars and richard docs it on - - dawkins has written about this he thinks bipedal is a merged that it was a cool thing to do. and chimpanzees and gorillas occasionally move on two legs but if for some reason that was the fat in that population then you could have more and more individuals aping each other. and bonus to the extent you might get some of those anatomies that are key to bipedal locomotion not because you inherited them genetically but acquired them three or life. the best example is when you are born your femur is perfectly straight but as you start to toddle around your femur begins to angle in. you become not need but we are not born that way. some you find that femur with an angle it tells us this individual had to have walked on two legs because there is no other way to get the angle so there is a cool combination of anatomy you are born with an anatomy that you acquire that land together in your musculoskeletal systems to allow you to move on two legs. >> thank you. >> what circumstances make it easier to find more fossils today? >> great question

richard dawkins has written about this. he thinks that it emerged as sort of a meme, that it was just a cool thing to do and that chimpanzees and gorillas occasionally move on two legs and if that became for some reason the fad of the population, you could have more and more individuals at each other, which is what we do. and because it is plastic to an extent you might get some of the anatomies that are key not because you inherited them genetically but because you acquired them through your life. so the best example of this, when you are born, your femur is perfectly straight. but as you start toddling around, your femur begins to angle in. but we are not born that way. when you find the femur as was done in 1973 and it has an angle to it, it tells us that this individual handy to have walked on two legs because there is no other way to get that angle. so there is a cool combination of an anatomies that you are born with and that you acquire that blend together in your muscular skeletal system. >> okay. thank you. >> we h