Nobody has done more to sink the claim that climate change is endangering polar bears than zoologist Susan Crockford — and she may have paid for it with her job. After 15 years as an adjunct assistant professor, Ms. Crockford said the University of Victoria refused without explanation in May to renew her contract, despite her high profile as a speaker and author stemming from her widely cited research on polar bears and dog domestication. Ms. Crockford accused officials at the Canadian university of bowing to “outside pressure,” the result of her research showing that polar bear populations are stable...