Experts have recorded over 40 different types of stone tool use in chimps. In West Africa, apes at several locations use wood or stone tools to crack nuts to feed on the kernels. In East Africa, although nuts are available, chimps don't eat them. <A HREF="http://news.bbc.co.uk/hi/english/sci/tech/newsid_1484000/1484261.stm">Click here: BBC News | SCI/TECH | Cultural habits of chimps</A>