Further Reading

B. Bower. “Bigger numbers, not better brains, smarten human cultures.Science News. Nov. 13, 2013.

 

B. Bower. “Where do humans come from?Science News for Students. Nov. 5, 2013.

 

E. Sohn. “Ancient cave behavior.” Science News for Students. Oct. 19, 2007.

 

E. Sohn. “Chimpanzee hunting tools.” Science News for Students. March 2, 2007.

 

E. Sohn. “Symbols from the Stone Age.” Science News for Students. Nov. 4, 2003.