1. Dr. Jane Goodall - A renowned primatologist and conservationist known for her pioneering research on chimpanzees in Tanzania's Gombe Stream National Park. She is also a prominent advocate for animal welfare and environmental conservation. 2. Dr. Neil deGrasse Tyson - An astrophysicist, author, and science communicator who has made significant contributions to the field of astrophysics. He is known for his work in popularizing science and has hosted several television shows and podcasts on scientific topics. 3. Dr. Temple Grandin - An animal scientist and autism advocate who has made significant contributions to the welfare of livestock animals through her research on animal behavior and design of humane handling systems. She is also known for her advocacy for individuals with autism and her work as a public speaker. 4. Dr. Sylvia Earle - A marine biologist and explorer known for her research on marine ecosystems and conservation efforts. She has led numerous oceanographic expeditions and has been a prominent voice in advocating for the protection of the world's oceans.