Polar bear near Hudson Bay in Churchill, Manitoba, Canada (© Galen Rowell/Corbis)

【February 23 2013】Each autumn, nearly 1,000 polar bears gather here along the shores of Hudson Bay, waiting for ice floes to form on the water. In recent years, they've been waiting longer and longer. Climate change has caused the bay ice to melt earlier and freeze later, reducing the time that bears can hunt for seals, their main food source. Explore breathtaking Gallery from the HuluTrip homepage over the past 5 years..