Looking at the mouse in his hand, Richard's eyes flashed, and then he shook his head.

No, not dead. The heart was still beating, but the vital signs were very weak, and the mouth was long, making a heavy wheezing sound, which seemed to be ...... Somewhat suffocating?

Reaching out to place the mouse on the ground, Richard stepped aside, picked up an oil lamp lit in the room, placed it in the iron ring, and then took it out again.

Sure enough, the oil lamp had gone out.

This can determine why the iron ring can't be filled with living creatures, or why it can't be put into living creatures for a long time, because there is a vacuum inside.

Vacuum? No air?

It makes sense to think about it that way.

Air has volume.

Usually, if you put things in the warehouse, you can fill the warehouse, but you can't feel the effect of the air, because the warehouse is not closed, and as the things are put in, the air will be squeezed out of the warehouse.

But inside the Iron Ring is different, it is an absolutely closed and isolated space that cannot be connected to the outside world, and the volume occupied by air cannot be ignored. If you don't vacuum the space inside the ring, you'll probably only be able to put a very small amount of it, and if you put it in, you'll be forced out by the air.

Although air can be compressed, anyone who has played with injections on modern earth should understand that the smaller the volume of compressed air, the greater the force of the rebound. If you compress the air to half and then force something in, it is likely to be directly squeezed by the rebound force of the air, which obviously outweighs the loss.

After all, the value of air is almost non-existent, and if you can put something, it will naturally not let a cloud of air occupy the space, and the iron ring will be pumped into a vacuum.

In this way, the question of the placement of living creatures can be clarified.

It's not that the space props in the current world can't be put into living things, but it's just that this use is abandoned for the sake of maximum utilization. If you have to put in a living thing, you can just let the living thing wear an oxygen cylinder. Or, if you vacate the space inside, completely abandon the storage function of the warehouse, and fill it with a certain amount of air, then you can let a living form survive for a short time.

In fact, the space in the Iron Ring is relatively small, and if it were larger, as the legend says, with thousands of cubic meters and cubic kilometers, there would be no such problem. In a huge space, air can circulate, allowing storage and life-storing at the same time, and even more advanced modifications.

For example, we can find a way to create an energy source, and then move soil, water, air, plants, bacteria, and animals into the space to create a biological environment that can circulate normally.

This kind of environment, made a little smaller, is an ecological ball. Slightly larger, it's a self-sufficient garden. If it's bigger, it can be made into a village.

Bigger, you can craft a city, a plain, or even an entire continent. If you continue to expand, you can form a planet, a galaxy, and even a universe.

Richard sometimes wondered if it was possible that the modern Earth he had been in, and the current world, had been made in this way.

A world that is artificially created and exists in a box?

This is not unfounded conjecture, Richard read in The Monroe Chapter about a space spell that was lost to an ancient wizarding civilization.

The name of the spell is "Paradise Lost", and the caster can use his powerful power to cut a piece of space from the main world and open up a "half-plane" similar to a small world. In the half-plane, the caster can set everything as he likes as a god, can modify the terrain, environment, climate, can place creatures, humans, and finally make a kingdom to carry around.

Due to the different needs of the caster, the kingdom behaves in a variety of ways.

Adventurous spellcasters will turn it into a huge war fortress with tens of thousands, hundreds of thousands of heavily armed soldiers, thousands of wizard legions, numerous giant mechanical golems, tame demonic behemoths, dangerous spell fighting machines, and more. Once in distress, the caster can instantly unleash a large army to help him fight and crush his enemies.

The caster of the study will turn it into a vast academy where brilliant people from all over the world live and work for him. Spellcasters who like violence will turn it into a bloody Purgatory City, building one Colosseum after another, and holding human hunts from time to time. And the spellcaster who likes women directly and simply establishes a real "daughter country" in it, so that beauties of all kinds of styles can live in it and satisfy their own selfishness.

When the caster travels around the world, he can return to his "Paradise Lost" at any time to rest, enjoy, and relax, which is why it is called "Paradise Lost" - in which fun is lost, because every moment is fun.

This spell once provoked the collective madness of ancient wizards, and according to the records of the "Monroe Chapter", there was a time when all powerful wizards were carving out their own "Paradise Lost", hoarding everything in "Paradise Lost" like hamsters in winter. However, after the Holocaust, everything ceased to exist, whether it was the Overworld or the half-plane in Paradise Lost, all destroyed.

When the new wizarding civilization developed from the ruins, the inheritance of space spells has been broken, so until now, the wizards in the current world can no longer create space items, let alone open up half-planes like Paradise Lost. With the passage of time, space props have become extremely scarce as they have been damaged and handed down. Even if it is only a dozen cubic centimeters and barely fits into a short staff, it is extremely rare.

Like the iron ring in Richard's hand now, it is already considered to be worth a lot.

Richard didn't know what the identity of the mysterious wizard was, and he could have such a practical iron ring. But since he got it, he has to find a way to squeeze out all the value.

Taking a deep breath, Richard continued the test.

......

After a long time, Richard had completed all the planned tests and had a general understanding of the iron ring in his hand.

Take out a new papyrus scroll, a quill pen, a bottle of ink, and prepare to record. Glancing at the broken wooden table on the floor, Richard shrugged, took papyrus and other things, walked to the bed, and put it on the bedboard.

On the ground, the rat that was almost dead after suffocating recovered little by little. Originally, he was lying on his back with his stomach open and gasping, but at this time he suddenly turned over and stood up.

Thinking back to the series of tortures he had inexplicably suffered just now, the rat's eyes swept around, and he hurriedly wanted to flee.

The next moment, I felt that my eyes fell on its body, and I immediately froze.

Richard looked at the mouse, his eyes flashed, and he muttered, "You know, you're lucky to have gotten the information I want before you die, or you'll have to suffer a lot." ”

"Squeak......" The mouse craned its neck and watched Richard scream.

"Let's go. Richard waved his hand, "Don't let me see you again, or I can't guarantee that you will be so lucky next time." ”

"Squeak ......" the mouse hurriedly drilled into the hole made on the side of the bed.

"Get out of the door. Richard shouted.

The rat stopped, looked at Richard, and the next moment ran out of the door, and quickly disappeared.

Richard wasn't surprised by this - rats can hear human language, and that's already a consensus in research. Not only mice, but also pets such as cats and dogs can master hundreds of human words, and the so-called animal IQ is equivalent to that of a human child at the age of four or five.

Seeing the mouse leave, without the last interruption, Richard picked up a chair from beside him, moved to the wooden bed, and began to write on a papyrus scroll with a quill pen.