The Powerpuff Girls, Townsville's resident superheroes, were relaxing at home one day, having taken the day off from crime-fighting. Suddenly, Professor Utonium came rushing into the room, announcing his newest invention. "It's a device that allows you to travel to any time period you want, including prehistory," he announced. The Girls had always wanted to see live dinosaurs, so they set the switches for the Late Cretaceous Period (70 million years ago). There was a grinding sound, a flash of light, and they were gone.
Meanwhile, 70 million years ago, a small herd of Apatosaurus had just witnessed the hatching of their only surviving baby. They named him Littlefoot. Now the herd, which consisted of him, his mother and his grandparents, was no longer in danger of dying out. Littlefoot's mother explained to him about the different kinds of dinosaurs, saying "There are Longnecks, like us, Threehorns, Spiketails, Swimmers and Flyers. They all stay with their own kind, because that's the way it's always been."
A few hundred yards away, a flash of light announced the arrival of the Girls. They marveled at this strange land, which looked exactly like what they'd been expecting. Fortunately, they still had their superpowers, allowing them to fly around, exploring the land. Neither the Girls nor Littlefoot realized that danger lurked nearby.
Author's note: Uh oh! What could that danger be? Find out next time! By the way, this story diverges from the true plot of the first Land before Time movie, because Cera, Ducky, Petrie and Spike are not accompanying Littlefoot on his trek to the Great Valley.