Two tall stacks of books stood on either side of the lectern, with Fang Yun between them.
Fang Yun gently nudged his glasses up again and said with a smile, "Class, a very, very long time ago, we humans believed Earth was the center of the universe, and that the stars and the sun revolved around Earth. Was that right?"
"No!"
Zong Moju snorted inwardly. Never mind these children of another race-even he knew that.
"Soon, someone proposed heliocentrism, saying the sun was the center of the universe and our Earth revolved around it. Those who proposed this new theory were persecuted. Do we still think it's wrong to say Earth revolves around the sun?"
"No..." the children shouted in unison.
Fang Yun smiled. "That's right. Before long, we discovered that the sun wasn't the center of the universe! The universe contains countless stars and galaxies. Our Solar System is only part of the Milky Way, and the Milky Way is only part of the vast universe. Do these ideas seem strange to you now?"
"No!"
Zong Moju fell silent. He wondered how these children knew so much. He had only learned this from reading relevant books after becoming a Grand Academician.
Fang Yun smiled. "If we now say there isn't just one universe, but many, would you believe it?"
The children looked at one another. Some said yes, and some said no.
Zong Moju frowned, vaguely uneasy.
Fang Yun said with a smile, "Today, we'll start with the big bang theory. This proposes that our universe was born in a great explosion, which gave rise to everything. This theory is now widely accepted. Physicists conducted extensive research into the big bang theory, developing inflation theory, deriving an inflation formula, and successfully producing an inflation model. Observations made many years