Episode 4: BECOMING ARCTIC, BECOMING HUMAN
An eight-ton concrete ball and a 32,000-year-old needle collection. What's all this got to do with the Arctic? Find out on this episode of Threshold.
TRACKING THE ARCTIC CIRCLE ON GRÍMSEY ISLAND
Axial tilts, moon wobbles, an Arctic Circle that refuses to sit still — it's kind of confusing! These documents might help you wrap your mind around this phenomenon, supplied by Studio Granada Architects in Iceland:
Map of the Arctic Circle as it moves across Grímsey Island — the small zig-zags are caused by the moon
A more detailed diagram of that same map
Description of the project by artist Kristinn Hrafnsson
WHAT'S REALLY WARMING THE WORLD?
Bloomberg Businessweek's interactive article shows how much different factors, both natural and industrial, contribute to global warming.
MAP OF HUMAN MIGRATION
This map from National Geographic shows migration patterns for the wave of humans that populated the globe. That article says modern humans began leaving Africa 60,000-70,000 years ago. Other researchers date that migratory wave to closer to 80,000 years ago.
A PREHISTORY OF THE NORTH
Get a more in-depth picture of Arctic migration in this book by John Hoffecker.