Analysis of information sources in references of the Wikipedia article "Pan (genus)" in English language version.
Modern human brain sizes vary widely, but average ~1330 cc (Dekaban 1978, Garby et al. 1993, Ho et al. 1980a, Pakkenberg & Voigt 1964)
Certain activities involving chimpanzees will be prohibited without a permit, including import and export of the animals into and out of the United States, "take" (defined by the ESA as harm, harass, kill, injure, etc.) within the United States, and interstate and foreign commerce. Permits will be issued for these activities only for scientific purposes that benefit the species in the wild, or to enhance the propagation or survival of chimpanzees, including habitat restoration and research on chimpanzees in the wild that contributes to improved management and recovery.