Bufan stared at the towering boulder in front of him with an almost stunned expression.

The depressed mood did not stop his survival instinct and all the knowledge he had ever learned.

Blue-black, rough surface, not much water erosion, with a circle of ice erosion dents...... I can't tell what kind of material it is, but it is magmatic rock or metamorphic rock, not sedimentary rock......

A detail appeared, the depressions were not smooth, and it was clear that the former owners of this place had not been seen for a long time, and the stone steps that they had once tread smoothly had been roughened again by the erosion of the years.

The roots of the boulder are judged to be as deep as possible, but according to the analysis of the color of the water in the lower half of the rock, it definitely touches the surface diving layer...... Inside the pile of rubble at the bottom of the boulder, there is the sound of running water.

Buvan subconsciously looked towards the base of the boulder.

Through the crevices of some messy bushes with unfoliage, he finally noticed something unusual.

Cheering up and standing up, Bufan rotated his pickaxe again, drew a gap in the bushes, looked down, and in a bubbling mountain spring, a white skeleton was immersed in it, and there was a metal object with a blue and white luster next to the bone, which was not visible from Bufan's angle, because most of the bones and metal objects were covered by mud and sand.

How can bones immersed in water still be light-colored?

Shouldn't it be moldy and rotten?

The metal should have corroded a long time ago, but it was still shiny, could it be that it had just sunk not long ago?

Curiosity replaced the previous frustration, and the exhaustion of the previous rush disappeared, and Bouvan regained his strength.

Keep picking up the pickaxe, digging and smashing down the messy bushes, widening the working surface, oh, opening up the way in and out, then taking off your boots, rolling up your trouser legs, and picking out all the bones and metal in the water......

It was another continuous half-ring of busyness, and everything finally came to an end.

Holding the piece of metal in his hand, this object has a lot of weight, about a foot and a half long, one end is a sharp willow leaf streamline shape, there are double-sided double blood grooves in the middle, and the other end is a lumen-thin tube the thickness of a child's arm, obviously this is a spear tip!

Grabbing it and waving at the bushes, the tough branches and leaves are as sluggish as dead grass and rotten leaves!

Very handy! Very sharp!

Blue-white luster, soaked in water for many years, but there is no rust, the ripples on it are very beautiful, nickel alloy, chromium alloy, titanium alloy, tungsten alloy, or osmium alloy? Bufan stared at it for a long time, and he didn't figure out its material, no matter which one, this thing is definitely not a metal material of pure elements, if it is the first few things, it is good to say, if it is the last one, the metal osmium is highly toxic to humans!

With a dumb smile, Bufan secretly laughed at himself for being pedantic, no matter what material it was, this thing would be his own in the future, and if he put on a spear shaft, it would be a good self-defense weapon! A few hours ago, if there was such a thing, the head wolf could directly pierce its throat when it rushed up, and it would not cost so many hands and feet!

Look at the bones that were fished up.

The skeleton had been stitched together by him, but there were a lot of weird things.

It has been a while since the water was fished out, and the wetness has faded, its bones are still crystal silvery-white, and there are no signs of decay after immersion, the former owner of this skeleton is obviously an intelligent creature walking upright, the skull is very similar to that of humans, and there are many differences in subtleties, such as the ear holes on the skull are much higher and lower than those of humans, and in addition, the biggest difference is that the shoulder blade fossa of this skeleton has an additional attachment point, that is, the former owner of this skeleton has two arms on one side of the body, a total of four arms!

Bufan found four sets of humerus and ulna radius of the upper arm, but he did not find all the corresponding finger bones and phalanges at the end of the lower limbs...... However, this "man" has six limbs, but it is not bad.

Try to put the bones together as neatly as possible, imagining what "he" looked like before his death according to the characteristics of the bones, and Bufan couldn't help but speculate about the cause of "his" death......

At this moment, he desperately hoped that he had learned some forensic knowledge, even if it was not completely suitable for this world, but he could always see more context, instead of staring at a pile of bones like now.

The skeleton's owner was clearly once a warrior, as evidenced by the thick joints and the almost ubiquitous scars on the bones...... There are marks of chopping on the radius, broken and healed on the ribs, strip-like scars of varying shades on the femur and tibia, and even worse, multiple oblique dents of varying shades on the skull.

Looking at the skull, Bufan grabbed it again, looked at it carefully, and finally found some cracks in the position of the occipital bone at the back of his head that were not very obvious - maybe this was the cause of the warrior's death?

The neck bones in the skeleton were not complete, he couldn't find them all, maybe he had been shattered by a heavy blow?

Bufan doesn't know.

But this one was clearly killed in battle.

Apparently pointless to continue digging into this, Bufan stood up, his gaze sweeping around.

Perhaps there were many similar skeletons scattered all over the rest of the place, he thought to himself, but his eyes were once again focused on the dense caverns high above.

What he saw reminded him of Machu Picchu in South America, where he had been on Earth.

Prosperous because of the large population, but also dying out due to political decay and frequent wars, this may be the ancient civilization that once existed on this planet?

So where did those "people" go now?

Migrated, or perished?

Speculation was clearly useless, and Bufan soon stopped dwelling on it, and he was now a lone survivor rather than a scholar of alien history.

Find a stone nest on the spot, place the bones facing the grotto, and then pile up the stones, which can be regarded as a burial - I don't know if this race in this world believes in burial, but Bufan still did it, not for anything else, because he took the weapon of the owner of the bones, whether it was peace of mind or mercy on the dead, no one stood up to reproach him.

The greater the hope, the greater the disappointment, I just thought too much before, so loss is inevitable.

Adjusting his mood, Bufan prepared to explore the details of the grotto.

......

To look far away, you need to climb high.

To understand what a thing is, you need to look at it from a distance and look at it closely.

Climbing to the top of the boulder, Bufan realized that the rocky belt was a clutter when viewed from afar from the scaly tree, and when the view of the boulder was again bird's-eye, he saw a view that he had not expected at all......

Where is this chaotic stone belt, it is clearly a small city in a wild style!

At the top of the rock that I had passed by before, there were also a number of caves that were difficult to identify, and they were the outlying guard posts!

This huge rock at the foot of the mountain, in the center, the surface is engraved with gorgeous carvings, according to the laws of humanity, this place is clearly the residence of the chief or the temple of sacrifice!

For a moment, Bufan's heart beat like a drum.

He was not overjoyed to find the alien monuments, nor was he rejoicing at the possible wealth of gold and silver, but he was excited to survive!

A place where an alien can survive must be enough to provide him with a safe enough place to live!

No matter what kind of civilization it is, even if it belongs to the barbarian era, there must be countless weapons here - the spearhead before is proof! Maybe most of the debris in this ruin, which has existed for an unknown period of time, has been destroyed, but as long as he can find metal that can be used, he can make it into a weapon of self-defense!

Don't forget, he's a Ph.D. in engineering and mechanics! Learning may sometimes be lost, but it's never useless.

......

Descending to the top of the boulder, finding a shallow and narrow clean grotto, and throwing the debris around him inside, Bufan began to wander around.

Just as he had guessed through his previous observations, he saw petroglyphs covering the stone walls, inexplicable totems revealing sacredness and piety, and solemn statues connected to the stone walls—statues with four arms, with the same appearance as human except for the ears leaning back and some pointing!

However, unlike the three-headed and six-armed gods on Earth, these statues do not have costumes, and their bodies are engraved with ornate and mysterious textures, and it is not known whether the people who carved them were modeled after themselves or added decorations for the sake of faith...... None of this can be verified without seeing their former creators - what Boufan found before was a skeleton, and it was obviously impossible for a skin to exist.

Continuing further, one after another, Bufan found that the boulder had been hollowed out almost entirely, and the twists and turns of the corridor were nearly three meters high, and it extended in all directions, almost running through most of the entire rock mass.

The sundries in the stone chamber have long been lost, unless they are metal or stone objects, which have long since decayed into gray-black soil, and there is no stench of decay in the stone chamber, only some damp smell from the bottom of the stone chamber......

Moreover, the size and pattern of the stone room can be clearly distinguished, such as the rest room used by the owner, the banquet room, the kitchen, the children's room, and the place where the grain is reincarnated...... the quarters of the servants, the sentry posts, the storehouses, the arsenals...... And so on, there are many facilities in it!

Perhaps because of the age, some organs and facilities that were obviously intended to prevent foreign invasion have also lost their function, so Bufan's exploration is almost unimpeded.

The reason why I say almost is because Bufan found the remnants of the trap door in the most secret location, and inside is the most important and hidden place of this stone house - the arsenal.

For Bufan, who desperately needs a sense of security, what could be more important than a weapon?

No!

So like a mouse entering the rice warehouse, Bu Fan began to stir around in the arsenal......

This thing looks like a shin armor? Keep it! What kind of mess is this? The cuirass buckle doesn't fit, throw it away! Hey, this is a good armband, you must keep it, you can use it if you change the size! This is a knife? It's too long and heavy to change, throw it aside and look back! This is good, the thickness and weight are appropriate......

By the time he returned to the grotto, where he had left his debris with a large pile of harvest on his back, both stars had begun to deflect, and the sky had turned blue-purple......