Brown-polar hybrid bears may be a result of climate change, herd formations help caribou avoid mosquitos, data system connects animals from different zoos for captive breeding, and fluoride keeps sharks cavity-free.

Huge herds of caribou play an integral role in shaping the Arctic landscape.

To survive in harsh winter conditions, animals on Ellesmere must develop special adaptations to stay warm, conserve energy, and find food in a barren world.