Her profound scientific discoveries-such as the discovery of toolmaking by chimpanzees-laid the foundation for all future primate studies .
她那傲人的发现，例如黑猩猩可制作工具，为后来所有的灵长类动物研究奠定了基础。
A marked increase in the number of sweat glands and a reduction in body hair could have provided that , jablonski speculates , in turn allowing for further brain growth as homo began to use those bigger brains for toolmaking , planning , and other cognitively challenging activities .
