Jane Goodall, one of the most famous scientists in the world, has died at 91-years-old. Her institute said she passed away from natural causes while she was in California on a speaking tour.

Ms. Goodall became known for her work with chimpanzees in Africa. She started studying them back in the 1960s in Tanzania, and learned many things that totally changed what people thought about animals. She found out chimps use tools, have feelings, and even act kind of like humans with their families. Before her, scientists didn’t really think animals could do that kind of thing.

Her discoveries made her super famous and respected in science. But she didn’t just stop at studying animals — she spent her whole life trying to protect them and the environment. She traveled all over the world to talk to people, especially students, about helping the planet. Even when she was older, she never slowed down.

“Dr. Goodall’s discoveries as an ethologist revolutionized science, and she was a tireless advocate for the protection and restoration of our natural world,”
— Julia Jacobo, ABC News

Sophomore Alessandro Sirotka said, “It’s crazy how one person’s work can change science and the world at the same time.”

Sophomore Samuel Armas said, “She never stopped trying to make the world better.”

Ms. Goodall was supposed to give a speech in Pasadena, California, to students the same day she died. Instead, a video she recorded before was played. In it, she talked about how young people can help protect the planet.

Even though Jane Goodall is gone, her work changed how everyone sees animals forever. Her legacy will always inspire people to care more about the world.