Chen Han hurriedly returned to the exploration room of Room F4. Sure enough, Chen Han saw a small gray-white leg bone exposed in the north corner of the exploration area.

There wasn't much of the skeleton exposed outside the soil, only about 3-4cm, but Chen Han could tell at a glance that it was a human skeleton.

And based on the exposed shape and thickness, he could also deduce that it should be a calf bone or hand bone.

Because except for the limbs, the bones in other parts of the body can never reach this thickness!

Chen Han quickly took out the brush and bamboo skewer from the tool box.

Squatting in front of the skeleton that has not yet been exposed, with a serious expression like a film applicator under the overpass, he carefully cleans the soil covering the skeleton.

Cleaning out this skeleton is no simple task.

Archaeological excavation is a matter that requires great patience and meticulousness. It is very tiring to clean away the soil covering the skeleton without damaging the state and posture of the skeleton.

But Chen Han didn't feel irritated or troubled at all and enjoyed it very much.

Little by little, the skeleton, with only half of the leg bones exposed above the soil, gradually began to reveal its appearance before it was buried.

At two o'clock in the afternoon, when Zhang Jianbo, Su Sa, and Zhuang Yunpeng finished lunch, took a nap, rested for a while, regained their energy and returned to work, Chen Han had already cleaned out most of the skeletons!

"Holy shit, you cleaned this up in three hours?" Zhuang Yunpeng stared at the skeleton with the lower half of the skeleton exposed, which was a shock.

Generally speaking, if one third of such a skeleton that is completely buried in the soil can be cleared out in half a day, it is considered a fast progress.

How could anyone be like Chen Han, who could clear out most of the items in three hours?

Su Sa quickly walked to Chen Han and squatted down, staring at the bones in front of him.

"The pelvis has been cleaned out."

She observed carefully for a while, then reached out to greet Zhuang Yunpeng and Zhang Jianbo.

"Come and take a look."

"The pelvic wall of this skeleton is thin and smooth, the side walls are straight and shallow, the entrance is wide, and the exit is oval."

"And the subpubic angle is obviously greater than 90 degrees!"

"This is obviously a female skeleton!"

Upon hearing the sound, Zhuang Yunpeng and Zhang Jianbo squatted over and looked up and down the lower body of the skeleton with Su Sa.

Every archaeologist has learned how to determine age, gender and height from bones.

They and the forensic doctors were taught this by the same master.

Moreover, archaeologists should be more comfortable using this skill than forensic scientists.

After all, forensic doctors rarely encounter corpses that have turned into bones during autopsies. It is not easy to encounter them even once every few years.

Archaeologists, on the other hand, basically have to excavate about ten skeletons a year, and even this is still relatively few.

So although Zhuang Yunpeng and the others are still relatively young, the bones judge that they are all experienced in this area.

Through the different differences between the male and female pelvic bones, they easily determined that this was a female skeleton.

"Well, this skeleton is indeed that of a woman." Chen Han, who was carefully cleaning the soil with his head down, said without looking back: "Not only is it a woman, but this is also a very young woman."

"Based on the age changes of the pubic symphysis, the death age of this female skeleton should be between 23 and 26 years old. Even four thousand years ago, this was considered a young death."

"Oh?" Zhang Jianbo heard the sound and looked at the pubic symphysis of the skeleton.

The age identification of juvenile skeletons mainly depends on the time when the ossification center of the limb bones appears and the degree of epiphyseal healing.

For skeletons over 20 years old, the age changes in the pubic symphysis are the most valuable.

Secondly, when the skeleton is incompletely preserved, you can also look for the remains of teeth and use the age of the teeth to infer the age of the deceased.

The upper body of this skeleton has not been cleaned yet, so there is no chance of looking for the teeth yet.

But the pubic symphysis surface has been cleaned out.

After the three people gathered around the pelvis and observed it carefully, they all nodded and agreed with Chen Han's inference.

This is indeed the skeleton of an adult female aged 23-26 years old.

Zhuang Yunpeng rubbed his chin and clicked his tongue twice, and said with some emotion: "It was not easy for our ancestors in ancient times to live long."

"Young girls in their twenties, we are still considered children now."

Chen Han, who had remained completely indifferent when Su Sa was startled at the side before, rarely stopped what he was doing when he heard Zhuang Yunpeng's emotion, turned to look at him, and said very seriously:

"Brother, I am 23 years old this year."

"Ahem..." Zhuang Yunpeng waved his hands repeatedly: "I didn't mean to talk about your child. The young man's association ability should not be so strong."

Su Sa couldn't help but shook her head: "Okay, let's start working. If we want to chat, we can talk after work is done."

Seeing that Chen Han had almost cleared out half of the skeleton in just three hours, Su Sa still felt a sense of urgency.

Why can't I, a senior sister, lose to a junior junior brother who has just started?

Picking up the square-head shovel, Su Sa chose a corner and immediately threw herself into the struggle.

Zhuang Yunpeng and Zhang Jianbo looked at each other, shook their heads, picked a spot and started digging again.

Although they were the first to discover this skeleton, Chen Han had already cleaned up most of it, and they would be embarrassed to rob it again with their junior brother.

There was only a skeleton on the left and right. It was not worth much, so the two of them soon stopped caring about it.

In the F4 exploration area, after a brief period of excitement, it soon became quiet again, leaving only the "rustling" sound caused by the constant waving of shovels and brushes.

A long while later, when the sun had already set halfway up the mountainside, a sound of surprise once again broke the peace in Tanfang.

"Eh... weird!" Chen Han held the brush in his hand and looked at the white skull that had just exposed a corner in front of him with some confusion.

Chen Han's voice of surprise reached Zhuang Yunpeng's ears clearly.

The three of them gathered around Chen Han again, wanting to see what kind of problem the junior brother had encountered.

I saw a curved skull appearing in front of Chen Han.

Logically speaking, it is normal for skulls to appear when the bones are being cleaned.

As long as everyone has a head, it would be strange to not find the skull!

However, Zhuang Yunpeng and the others soon understood why Chen Han was surprised.

The skull is indeed a skull, but the location of this skull is a bit wrong, and the shape is also a bit wrong.

This skull appeared on the chest of the female corpse, which is obviously not where it should be.

"Is this a decapitated skeleton?" Zhang Jianbo guessed with some uncertainty.

"That's wrong!" Zhuang Yunpeng shook his head, pointed at the skull, and made several gestures with his hand: "The size and shape of this skull are obviously different from this skeleton."

"The skull of an adult shouldn't be so small!"

"Even if this skeleton is a female, the proportions of this skull are a bit too small!"

Su Sa nodded with understanding.

The truth is already evident.

"These are two superimposed skeletons?!"
Chapter completed!