"It's hard not to speculate that this is related to antigravitons."

“The universe is amazing.” After a moment of silence, He Bilin exclaimed from the bottom of his heart, “When the graviton was first discovered, we all agreed that the antiparticle of the graviton should be itself.”

"Just like a photon."

"This discovery has completely overturned our previous understanding."

"That's why I didn't dare to make a judgment back then."

Lu Yongchang slowly shook his head and said in a low voice, "Don't speak too soon."

"I still believe that, under normal circumstances, the antiparticle of the graviton is itself."

"Otherwise, many phenomena in the universe would be difficult to explain."

"As for these abnormal data..."

At this point, Lü Yongchang fell silent again.

After a long silence, he managed to utter a few words with great difficulty: "Perhaps, this has something to do with the nature of black holes."

He Bilin's eyes flickered, and he quickly understood the meaning behind Lü Yongchang's words.

"Professor, you mean..."

"Does the existence of black holes cause gravitons to temporarily exhibit the opposite properties?"

Lü Yongchang nodded, then shook his head.

His eyes looked somewhat lost.

At that moment, he once again deeply felt his own ignorance.

"I...I don't know."

"Perhaps it's the effect of the black hole, or perhaps it's something else..."

Lu Yongchang's lips moved slightly as he murmured softly.

On the eve of becoming a Type V civilization, a faint dark cloud once again appeared on the horizon of the human scientific world.