The Western Arctic's mammoth Mackenzie Delta is the second largest in North America after the Mississippi. It is a biological "hotspot", a transition zone between ecosystems - from the familiar boreal forest, across the tree line to the ever-frozen tundra. Here we find strange and mysterious landforms above an immense underbelly of permafrost featuring a phenomenal diversity of microorganisms, and strange creatures that tell a story of an ever changing Arctic. This is the migratory destination - and summer home - to several million birds, fish, animals...and humans.

pt. 1. Mackenzie Delta: Delta Discoveries: Arctic Secrets Series -- pt. 2. The Inuit of Herschel Island: Delta Discoveries: Arctic Secrets Series -- pt. 3. The Aklisuktuk Pingo: Delta Discoveries: Arctic Secrets Series -- pt. 4. Beluga Whales of the Arctic: Delta Discoveries: Arctic Secrets Series -- pt. 5. The MacKenzie Delta: A Fragile Ecosystem: Delta Discoveries: Arctic Secrets Series -- pt. 6. The Wood Frog: Arctic Adaptation: Delta Discoveries: Arctic Secrets Series -- pt. 7. The Arctic Food Web: Delta Discoveries: Arctic Secrets Series -- pt. 8. Inuit Culture Disrupted: Delta Discoveries: Arctic Secrets Series -- pt. 9. Arctic Vegetation in the Mackenzie River Delta: Delta Discoveries: Arctic Secrets Series -- pt. 10. Permafrost Exposed: Delta Discoveries: Arctic Secrets Series -- pt. 11. Muskoxen: Delta Discoveries: Arctic Secrets Series -- pt. 12. An Arctic Invasion: Delta Discoveries: Arctic Secrets Series.