veit might survive a little better. and so that is a possible idea as well.ots and lots of hypotheses. and we still do not have a handle on it and that is okay. there's going to be plenty of things that new discoveries new fossil discoveries will allow us to revisit some of these ideas and retest some of these ideas. really the issue for me is not figure out which one is right. it's beginning to narrow that down and eliminate the ones that are clearly clearly wrong. by refuting ideas rather than proving them. >> right. so we do not know yet why. we do have a lot more information that we used to about the timeframe in which it evolved. we could talk about some of the discoveries have allowed you and your colleagues to start to piece together when this all happened? and what bipedalism might have evolved from and where it took us? >> a lot of folks listening will probably know about lucy, discovered in the 1970s. lucy is a magnificat skeleton that got her back here the cast of her the original is in ethiopia of course. not long after lucy was discovered there w

veit stays here, and you call the dog, call it perfectly. reward reward wonderfully. us. well done guys, here it is. look, super is one more step towards fighting. fine. wait wait well done, endurance. you start moving in that direction. ugh stop. reward very briefly. take the leash in your left hand. take the treat on the leash to the right. move towards the fight and step over with the paws of wax, through the fights, well done. well done. well done step over everything is super. right from the first time well done sasha now you not only know how to get out of the wax from the entrance of the elevator from the apartment. not only do you know how call and put. yes, now you know how to pass other dogs. it turns out that the walk is a real job. it's a full day job. you and i have a different dog. excellent yes, another, in order for him to learn to behave in a worthy manner at home, you don’t need to do anything, you don’t need to scold. he does not need to be punished if you, sveta, see that bosco is in a chihuahua. just hold it by the neck. calm down, leave him. he w