Scientists strapped cameras on 20 polar bears. Here's what 115 hours of footage revealed

Scientists wanted a bear’s eye view on climate change so they attached GPS cameras to polar bears in Hudson Bay, Canada. The footage shows them feasting on a beluga whale, eating bird’s carcasses and even playing in the water. But the bears were also forced to forage for berries and vegetation, rest for long periods to conserve their energy and embark on risky, desperate swims to find food.