Conservationist Dame Jane Goodall, a world-leading expert on chimpanzees, has died aged 91.
Former US president Barack Obama was among those who paid tribute to Dr Goodall, who he said, "opened doors for generations of women in science".
Actor and environmental campaigner Leonardo DiCaprio said that she "inspired millions to care, to act, and to hope", and called her a "a true hero for the planet".
Dr Goodall died of natural causes while in California on a speaking tour of the US, according to a statement from the Jane Goodall Institute.
It said her discoveries "revolutionised science" and that she was "a tireless advocate for the protection and restoration of our natural world".
