Tundra became the city's sole polar bear when 27-year-old Gus was euthanized at the Central Park Zoo in 2013, the Associated Press reports.

On a trek through the subarctic tundra of Churchill, Manitoba, writer Bianca Bujan gets up-close with polar bears — the largest land predators on Earth, while embarking on a bucket-list journey ...

On a trek through the subarctic tundra of Churchill, Manitoba, writer Bianca Bujan gets up-close with polar bears — the largest land predators on Earth, while embarking on a bucket-list journey ...