i'm still davis don't shipping's other thing is i'm not sure who this is dr. shannon mixer, and he uses ancient techniques to make stone to just like on the distant ancestors that the only differences u. s. clubs want doing it. at the lucy site, there is no stone tools, but uh nearby at a site called the key code of we found a couple loans that have marks on them that are characteristic of butchery with stone tools. and so we didn't have the site with the stone tools, but we have animals that show that they were butchered whisco on tools. stone tools allowed our ancestors to access calorie, which bone marrow from congress's, supplying nutrients essential for developing natural brains. lucy's discovery goes beyond human evolution. for this, if you open scientists, it's a matter of national pride. it's our history, so it'd be done. so if you might need to. so that's out of being the source of such a pretty shows. how do you think is lucy's shoulder joints display signs of severe injury? tracy reckons she might have died in the falls from a tree, which apparently isn't an uncommon way to g