Photo: Polar Bear Tour

A large polar bear checks out the passengers inside a tour bus during a visit to the icy tundra in Churchill, Manitoba, Canada.

An inquisitive polar bear checks out the passengers on a tour bus during a visit onto the icy tundra with North Star Tours in Churchill, Manitoba, Canada. The polar bear is the largest land carnivore with grown males weighing between 350 to 650 kilograms and measure around 3 metres or more long while the females weigh between 150 to 250 kilograms and measure around 3.7 metres long.