Yellowstone’s Grizzly Cubs Kept Vanishing — They Found the Killer and Evacuated the People Instead

In 2025, more grizzly bears died around Yellowstone than in any year on record. Most of those deaths were caused by people. But the official count leaves something out: the cubs that vanish deep inside the parks, where almost no one goes, and where no one ever finds a body. Two dead yearlings at Colter Bay. Three missing cubs that never made the mortality list. A survival map that turns out to be a ring, not a line. Mother bears that move toward people to escape males, and a park that has to push them away again. And a 2016 study that put the two leading explanations head to head and found a clear winner. In this episode: why cub survival inside Yellowstone National Park was lower than outside it, what really kills grizzly cubs (it isn't wolves), the "human shield" strategy first measured in Sweden, the deaths of Grizzly 399 and her son 1058, why Yellowstone closed trails 30 times in 2025, the Mystic Falls attack near Old Faithful in May 2026, and the open scientific question that could matter most if Yellowstone's grizzlies lose federal protection. 📁 FREE Frontier Evidence File for this episode: the 2025 mortality breakdown, the three survival zones, the named-bear timeline, the myth-vs-evidence table, and every study cited. Download it here: drive.google.com/file/d/1OesJOKQM_hcv8k5f0QRDnQ7D7MC2FBKw/view?usp=sharing TIMESTAMPS 0:00 Intro 1:45 The Comeback 5:06 Where Cubs Survive 6:55 The Real Killer 11:51 Why Now? 16:02 Moving the People Key sources: Interagency Grizzly Bear Study Team / USGS: provisional 2025 grizzly mortality data Schwartz et al. (2006), Wildlife Monographs: cub survival inside vs. outside Yellowstone National Park van Manen et al. (2016), Journal of Wildlife Management: density dependence vs. whitebark pine Steyaert et al. (2016), Proceedings of the Royal Society B: mother bears using humans as shields Yellowstone National Park Human-Bear Conflict Report 2025; Grand Teton and Yellowstone news releases Have you ever been turned back at a closed trail in Yellowstone or Grand Teton? Tell me where in the comments. #Yellowstone #GrizzlyBear #GrandTeton #FrontierEvidence #WildlifeScience #Grizzly399 #BearCountry