Swimming polar bears, a kokanee comeback, crow attacks and more

What’s the big deal about 5,000 kokanee salmon being counted in the Kathleen Lake system of Yukon’s Kluane National Park in 2015? It’s that just seven years earlier there were only 20 of them. Carmen Wong, an ecologist at the park, told the CBC that the kokanee population seems to be experiencing the same crash and resurgence cycle happening with other sockeye salmon, which could be climate related.