Discover the extraordinary capabilities of hagfish, the slime-producing fish that has survived on Earth for over 300 million years. -- In 2017, a truck screeched to a halt. One of its containers slid off, hit a car, and spilled its contents— thousands of kilograms of hagfish. The result of this accident was an absolute mess: the highway was coated in a thick slime that took the fire department 7 hours to clear. How did these creatures create this stupendous supply of slime? Noah R. Bressman and Douglas Fudge investigate. Lesson by Noah R. Bressman and Douglas Fudge, directed by Denys Spolitak.