Chapter 686: Experiments Not Dared to Be Done on Earth!_2

"What is space?"

The space seen by the naked eye is an emptiness, and the space assumed by theory is similarly an emptiness, yet an empty space can absorb energy.

According to Zhao Yi's cosmology, space absorbs energy and then expands.

But why does it expand?

How does it expand?

What are the rules for its expansion?

Without resolving 'what space is', it is impossible to even imagine the answers to the previous questions.

When faced with the challenge of understanding space, several people began to ponder. They did not know how to describe space, and even the concept of 'multidimensional' was insufficient to interpret it.

At this moment, Zhang Qican suddenly looked up and said, "I just heard Mr. Witten saying that all matter is composed of strings, so could space also be composed of strings?"

Several people turned their attention to him.

Edward Witten furrowed his brow, and Qiu Chengwen also fell into thought.