"Two worlds?"

Zhang Yuhang grew his mouth and looked at Duan Pingsi blankly, the person who shocked him again and again.

"That's right, it's two worlds, the mirror image is one world, our reality is one world, it seems to be a mirror delay, but in fact time has become different!" Duan Pingsi explained.

"It's crazy!"

The Fortune Wolf sighed, not lamenting the problem of the delay of the mirror, but lamenting Duan Pingsi's whimsy, which was crazy on the one hand, and somewhat reasonable on the other.

However, what Zhang Yuhang, Cai Wolf and the others didn't know was that Duan Pingsi knew a little bit more than any of them, and that little bit was the existence of time travel.

It is precisely because his ancestors traveled to the present world that he knows about time travel, and it also allows him to have a more "crazy" thinking than Zhang Yuhang and others.

"In other words, this iron ball can slow down time, and your explanation still makes sense, so such a thing should also come from outside the world!"

Zhang Yuhang, who had been stunned for a long time, finally came to his senses, looked at the hole above the iron ball, and suddenly felt a chill in his heart, the sky was not calm!

"But that's all we can guess, if only we could cut it open and see!" Duan Pingsi said as he made a knife with his hand and made a cutting motion on the iron ball.

"Snort!"

The iron ball suddenly gave birth to a few more electric sparks, which frightened Duan Pingsi and immediately retracted his hand and scolded: "Yo, can it still understand people's words?" ”

"Snort!" The iron ball rang out twice, as if in protest.

However, the protest was ineffective, and the cutting work began in earnest the next afternoon, where the iron ball was located, because the iron ball was so heavy that they could not move it even a single bit with three large cranes.

The Fortune Wolf got a large cutting machine out of nowhere, and even invited a professional cutting team, everything was ready, and Zhang Yuhang, who couldn't wait, immediately ordered the power to be turned on.

"Bang la, bang lala,......"

The cutter pressed the power button, and the grinding wheel with a diameter of five or six meters was running rapidly, and everyone present held their breath at the same time, quietly waiting for the moment when the iron ball was cut.

However, a minute passed, and the iron ball was unscathed, and there was no spark around the grinding wheel of the cutting machine.

Zhang Yuhang saw that the situation was not good, so he said to a few cutters; "Check to see if the grinding wheel isn't touching well or if there's something wrong there."

The cutters went to check and found that the grinding wheel of the cutter was indeed acting on the iron ball, but the surface of the iron ball seemed to be so smooth that the grinding wheel could not leave any marks on it, let alone cut it.

After another five minutes, the ball showed no signs of being cut, its surface was still smooth as a mirror, and the grinding wheel had been worn out by more than half.

"Try a different grinding wheel!" Zhang Yuhang said to the cutter again.

So they changed the grinding wheel again, but this time the situation was exactly the same as last time, the surface of the iron ball still did not change, and the grinding wheel was also worn.

"If you can't cut such a hard and sharp grinding wheel, maybe it's because the physical method can't do it at all!" Duan Pingsi looked at the huge iron ball, and he was also at a loss.

"Then try chemistry!"

Zhang Yuhang listened to Duan Pingsi's words, and immediately ordered someone to take a lot of strong acid and alkali to splash on the surface of the iron ball, but the iron ball was still "as stable as Mount Tai", and the surface was still "untouched".

"What the hell is this?" The wolf has run out of patience with it.

"Lock off the scene, call it a day!"

After trying both physical and chemical methods, Zhang Yuhang had no choice but to order the work to be called a day, and when he took it away, he didn't forget to look back at the iron ball, hoping to find inspiration to open it.

When Duan Pingsi returned to the laboratory, Professor A was blaming himself for his actions, and he sat on the ground in a gloomy manner, crying for a while, and heartbroken:

"I shouldn't have provided them with the head of the ancient ape, now it's okay, I've researched aliens, and I also have an unshirkable responsibility for this matter, if it weren't for me, Professor Gao and they might not have died!"

Duan Pingsi didn't know how to comfort him, so he just helped him up and sat on the sofa chair, poured him another glass of water, and sat quietly on the side and waited.

After a long time, Professor A's mood gradually calmed down, and then said to Duan Pingsi: "Our research topic is getting more and more deviated from the original direction, but there is no way to do it. ”

"Anyway, it's all for the benefit of mankind, and it's the same everywhere you study!" Duan Ping said.

Their original research direction was paleontology, with the intention of perfecting all aspects of biological evolution, but now they are going further and further down the road of studying extraterrestrial organisms.

Duan Pingsi felt that it was no longer enough for him to have only knowledge of biology, and that studying extraterrestrial creatures might require a lot of knowledge in physics and chemistry.

"Buy some books on the frontiers of physics and take a look, the most basic physics knowledge should be known, and some should be added to astronomy and geography!" Professor Ah suggested to him.

In fact, after the tragedy of Professor Gao, everyone, including Zhang Yuhang, Professor A and others, made up their minds to fight these foreign executioners to the end.

To do so, we must rely on the most advanced biological, astronomical and physical knowledge of mankind, as well as on many space technologies, which is an insurmountable gap for mankind.

Unfortunately, humanity has been stagnant in space exploration, and since the Americans landed on the moon decades ago, humans have never landed on any celestial body other than Earth.

In terms of basic research in physics, there has been no major progress since Einstein; There are also no major breakthroughs in biology, chemistry, astronomy, etc.

In other words, whether in terms of basic science or cutting-edge technology, mankind has remained at the level of a few decades ago.

"It's a dangerous thing!" Professor A wiped away his tears and said indignantly.

"Because human beings are currently enjoying the shade brought by the trees planted by their predecessors, the comfortable life has made human beings lose a lot of their spirit, maybe the alien invasion is a good thing."

Duan Pingsi thought to himself that the alien invasion might be able to break through the door of the national blockade again like the Western powers did back then, so that perhaps human science could wake up again.

That night, Duan Pingsi "scavenged" a large number of astronomy and physics books from major bookstores, and he decided to make up for this knowledge.

Since then, the world has opened another door for him.