iD 2019.01: The Butterfly Effect in History
- How wolves shape our forests.
- 5 questions about the interior of our planet.
- The butterfly effect: unintended consequences in history.
- Who is accountable when an avalanche strikes?
- The wondrous whimsy of tree houses.
- The Earth and Moon's epic love story.
- The psychological test that can't be gamed.
Cover date: January 2019
On newsstands: November 9, 2018