Because of Science, this happens whether you know about gravity or not. Which goes to show that Science is happening all the time. From A Scientific Encyclopaedia for the Enquiring Young Nome by Angalo de Haberdasheri. Angalo looked around. "Gurder, come on." Gurder leaned against a tuft of grass and fought to get his breath back. "It's no good," he wheezed. "What are you thinking of? We can't fight humans alone!" "We've got Pion. And this is a pretty good ax." "Oh, that's really going to scare them. A stone ax. If you had two axes I expect they'd give in right away." Angalo swung it backward and forward. It had a comforting feel. "You've got to try," he said simply. "Come on, Pion. What are you watching? Geese?" Pion was staring at the sky. "There's a dot up there," said Gurder, squinting. "It's probably a bird," said Angalo. "Doesn't look like a bird." "Then it's a plane." "Doesn't look like a plane." Now all three of them were staring upward, their upturned faces forming a triangle.
