Monarch butterflies are still in the middle of their story – and it’s one that is precarious. Humans are still trying to figure out a lot about them, and aspects of the monarch story have been misrepresented over the years.
Research:

Dorothy Crowfoot Hodgkin’s Crystalline Chemistry, Part 1
38:04

SYMHC Classics: Sarah Bradlee Fulton
32:28

Behind the Scenes Minis: Stairs and Trains
29:25