Groundbreaking researcher and conservationist Jane Goodall has died at the age of 91. David Muir reports on how her research on chimpanzees changed the way many viewed our closest relative – and the natural world around us. https://abcnews.link/DUN2dcf | ABC World News Tonight with David Muir

Popular climber and influencer Balin Miller plunged to his death from Yosemite's El Capitan. The 23-year-old was reportedly livestreaming on social media with hundreds watching when the tragedy unfolded. Whit Johnson reports. | ABC World News Tonight with David Muir