With regard to the alternatives, we already have them. The cellular and genetic lines of research in humans are the most promising. AIDS is caused by a virus, so it makes sense to study the virus, not chimpanzees. We have learned virtually nothing about AIDS from the chimpanzee. Every major advance in AIDS research ... has come from human studies.
Roger FoutsGrowing up on a farm taught me a reverence for all forms of life. We were a large and poor farm family, so that meant that we had to kill and eat our animal friends. When you do that you are aware of the sacrifice that someone is making so that you may live. My mother always made sure we were thankful for those precious gifts.
Roger FoutsThe fact that all our ape cousins - chimpanzees, gorillas and orangutans - can acquire signs - is powerful evidence that our hominid ancestors' first language was gestural and that the vocal version of language was a relatively recent development. My own guess is that vocal language began emerging about 200,000 years ago.
Roger Fouts