Ty had grown accustomed to her ways. It was because he had said "spars." That was between Sonar and Taxlaw in the Encyclopædia Britannica, and thus belonged to her domain of knowledge. During their hike over the mountains and down the other side, she had turned out to be well informed, at least by troglodyte standards, about space exploration and the sun. So it had been easy to bring her up to speed on the last five thousand years’ off-planet developments. She now began to drift toward Ty. Einstein followed her as if his eyes were connected to her butt cheeks with fishhooks.