"It's so stuffy. The oxygen content is far too low."
Xu Yang sniffed the ancient, desolate scent of time drifting out from the hollow and murmured, "Luckily, I've already reached Star Level. I can even survive in space for a short while, let alone a place like this."
Then, Xu Yang swept his tail, knocking a watermelon-sized rock into the hollow.
Xu Yang tilted his ear and listened carefully...
Five seconds... no sound. Ten seconds... still no sound. It wasn't until thirty seconds later that Xu Yang finally heard an almost imperceptible noise within the silent cylindrical shaft.
Xu Yang silently calculated, and his heart skipped a beat. "I don't know this planet's gravitational acceleration. Assuming it's the same as in my previous life... damn, 4,410 meters deep? Could such an enormous battleship exist?"
He had mostly forgotten the physics he learned in middle and high school in his previous life. Although his university had offered a college physics course, how could Xu Yang, who had spent four years playing like crazy, possibly have studied seriously? He had only passed thanks to his teacher's kindness. Fortunately, when he had last transformed into a Howling Moon Demon Wolf, the power fed back by the inherited Sea of Blood had greatly enhanced him.
His memory and comprehension had both improved considerably. Xu Yang could even recall the details of wetting the bed as a child... Naturally, he could now easily dig up the knowledge he had once learned from the forgotten corners of his mind.
"Mm, no, it shouldn't be 4,410 meters deep. After all, the sound needs time to travel back too..."
Xu Yang had barely shown off his knowledge before realizing his mistake. His wolfish face could not help but stiffen in embarrassment.
Fortunately, he was the only one here.