As the Pteranodon kids are playing outside their nest, a few seedpods fall from a nearby tree, bonking Don on the head. This leads to a discussion about how far away things can fall from…maybe even from space?? Buddy hypothesizes that perhaps if a star came close enough, it could land on Earth! On the Dinosaur Train, the Conductor explains that things actually do fall from space. Big space rocks, called “asteroids”, sometimes land on Earth, and when they occasionally do, they make a biiiiig hole, called a crater. Don perks up at this—he’d love to see a crater! So the Conductor takes the Pteranodon Family up in the Zeppelin to see a giant crater from above! On the ground, they explore the crater and find fragments of “space rocks” from the former asteroid. As evening falls and our family flies back home, the Conductor and Mom and Dad surprise the kids with a picnic dinner on the Zeppelin—hurrah!