"Gurgle gurgle, gurgle gurgle," Vivian was holding a spherical part given by Freya. She was rolling it back and forth on a gentle slope. Each time she threw the metal ball from her hand, it would roll back to her against the slope. Vivian's gaze had always been fixed on the ball. Furrowing her brows tightly, she could not understand why this phenomenon occurred.
"Have you figured it out?" Lina and Catherine lost interest after watching for a while and started organizing their own things. After some time, they realized Vivian was still rolling the ball. They couldn't help asking, "Seeing as you're playing so enthusiastically, I take it you still don't understand. I don't quite understand though, we've encountered so many instances that upend our common sense on this journey. Why are you interested in this in particular? Is there something special about it?"
