Karsten Heuer and his wife Leanne set off on a 5-month, 1000-mile journey to walk in the footprints of the Porcupine Caribou herd, from Canada to the Arctic National Wildlife Refuge and back.

It is one of the 21st century's most significant adventures, as captured in Karsten Heuer's book, "Being Caribou."  Come along to learn what "Being Caribou" is all about.