Due to its vast size — stretching from Canada and Greenland in the north, to Mexico in the south — North America contains a ...

Joel wanted to investigate the effect of the bears on musk oxen behaviour – and with no polar bear to call on – he improvised. He grabbed a polar bear costume and headed north. This interview was ...

“Here is the largest land mammal of the polar zones, but we hardly know anything about musk oxen,” said Joel Berger, a wildlife biologist at Colorado State University and a senior scientist at the ...

A new study has provided fresh insights into how animals such as the woolly mammoth, musk ox and arctic fox evolved to survive the cold during the ice age.