Renowned conservationist and primatology expert Dr. . Jane Goodall has died at the age of 91. She became a household name after her groundbreaking research on chimpanzees in Tanzania inspired global environmental advocacy.NBC News chief environmental affairs correspondent Anne Thompson takes a look back on her life and legacy. Only death could silence Jane Goodall and her passionate defense of the environment. >> We got a window of time to start healing some of this harm we've done to the environment.>> At ...