An ancient culture dating back more than 5,000 years proved China’s early exchanges with other societies, experts say.

Experts believe the Majiayao culture had a close     1    (connect) with other various cultures. They put it forward at a recent meeting     2     was held in Gansu Province. With more than 5,000 years of history, it plays an important role in the development of the Chinese civilization (文明). This culture spread to Central Asia through     3     is now China’s Xinjiang Province,     4    (bring) rice from China to the west.

Swedish expert Johan first     5    (investigate) cultural sites in 1924. In the 1940s, Xia Nai named the sites after the Majiayao, with painted pottery (彩陶) as     6    (it) most special feature. Some experts point out that the Majiayao culture     7    (obvious) shares similarities with the cultures of some parts of the Black Sea. People from these cultures used pottery     8    (make) human head sculptures.     9     addition, some Central Asian features also appeared on the painted pottery of the Majiayao.

Actions     10    (take) to protect the Majiayao culture by building museums, organizing meetings and doing more research so far.

For 4,500 years, the Great Pyramid, or the Pyramid of Khufu,     1    （keep）watching over the Egyptian desert.

In that time, it has suffered the indignities（侮辱）of tomb raiders and archaeologists（考古学家）with gunpowder.     2     the latest survey of the pyramid's mysteries is far more complicated and     3    （take）a page from particle（粒子）physics. The fact     4     the particles interact differently with stone from with empty space led the scientists     5    （discover）a previously unknown 100-foot-long void（空间）,     6    （sit）somewhere above the pyramid's Grand Gallery.

“The good news is that the void is there, and the other good news is that this void is very big.”

Now what is it?

“We need the help of other people,” Mehdi Tayoubi, a researcher said. Maybe Egyptologists and     7    （expert）in ancient Egyptian architecture will provide us     8     some assumptions we can use for imitation（模仿）and to compare with the data we have to find some sort of architectural     9    （explain）for this void. Until then, the newly discovered space will be just one of many     10    （constantly）mysteries of this great wonder of the world.

6 . When archaeologist(考古学家)Zahi Hawass and his team set out to excavate an area near the Egyptian city of Luxor in September 2020, all they were hoping to find was King Tutankhamun's mortuary temple. Instead, the archaeologists came across the largest ancient city ever found in Egypt. Hawass, who exposed the discovery on April 8, 2021, believes the extremely large, well-preserved city is the "So'oud Atun", or the "Rise of Aten".

"The discovery of this lost city is the second most important archaeological discovery since the tomb of Tutankhamun," Betsy Bryan, an Egyptology professor at Johns Hopkins University and member of the team, said in the statement.

The city dates back 3, 400 years to the times of Amenhotep III, one of Egypt's most powerful pharaohs(法老), who ruled Egypt from 1391 to 1353 BC. The ninth pharaoh of the 18th Dynasty ruled during a time of peace, allowing him to accumulate large amounts of wealth. While archeologists suspected the pharaoh had used some of his riches to build what Hawass refers to as "the golden city", they'd never been able to find it.

The researchers believe that his son, King Akhenaten, briefly lived in So'oud Atun before founding the city of Amarna about 250 miles away. Historians think the pharaoh and his followers left to escape the priests(祭司)who were unhappy about his decision to give up all other deities(神抵)in favor of the sun god Aten. Following Akhenaten's death, his son, Tutankhamun, moved to Thebes, which also served as Ancient Egypt's capital. The scientists aren't sure if So'oud Atun was ever occupied again.

So far Hawass and his team have unearthed thousands of amazing artifacts(手工艺品). Among them are rings, amulets, and pottery vessels. They also found a well-preserved bakery, cooking, and food preparation area, complete with ovens and storage vessels. Due to its size, the researchers believe it may have been a commercial operation. Hawass, who says the team has only explored about a third of the lost city so far, believes there're a lot more surprises to be found.

7 . On July 31, 1697, a French lawyer named Jacques Sennacques wrote a message to remind a cousin in the Netherlands to send him a relative’s death certificate. To prevent others from reading the message, the note was carefully folded, or “letter locked.” The technique was used before the invention of envelopes. However, for reasons unknown, the note never reached the recipient and was instead stored in a postmaster’s trunk, where it remained undetected for centuries. Now, a team of international researchers has deciphered (破译) the contents of the over 300-year-old sealed letter — without opening it!

The chain of events leading to this technology began in 2015 when MIT expert Jana Dambrogio got a call from Daniel Starza Smith, a researcher at King’s College London. “He asked me, ‘What would you do if I told you there was a trunk with 600 unopened letters?’”

The trunk had once belonged to 17th-century postmaster Simon de Brienne. Historians believe the post office stored the undelivered letters. That’s because, in the 17th century, it was the recipient, not the sender, who bore the postage cost. When Brienne died in 1707, he donated the trunk of letters to an orphanage. Somehow, the trunk eventually made its way to the postal museum, where it lay until recently.

Since opening the letters would destroy them, Dambrogio and her team decided to develop technology to unseal them virtually. They began by using a high-resolution X-ray scanner to create a detailed three-dimensional image of a sealed letter. While the writing inside showed up very clearly, the numerous layers of folded paper pressed close together caused the words to overlap (重叠).

To solve the issue, the researchers created sophisticated algorithm (算法) capable of deciphering the writing in the cleverly folded letter, crease by crease. The virtual opening allowed the team to read the contents “while preserving letter locking evidence.” The algorithm took almost five years to perfect. Once perfected, they used it to open four locked letters and fully decode(解码) the one from Sennacques.

8 . Back in 2011,archaeologists first discovered a lost highway littered with Viking artifacts(古器物)—sleds, horse bones, walking sticks, a 1,700—year—old sweater and heap after heap of horse dung.

But now archaeologists have discovered so much more. They've published new research describing hundreds of items that have been found along Lendbreen pass: shoes, parts of sleds, and bones from packhorses. It would have remained hidden forever had the ice not rapidly begun melting, revealing all that roadside Viking litter.

The highway winds its way over the Lendbreen ice patch(流冰区) in Norway's Jotunheim Mountains, about 200 miles north of Oslo. "The pass was at its busiest during the Viking Age around 1,000 A.D., a time of high mobility and growing trade across Scandinavia and Europe," study co—author James Barrett said.

According to researchers, the highway was possibly built around the year 300. At the time, heavy snow covered rocks underfoot. Trading posts were built along the nearby Otta River. The road may have thrived for many more centuries.

“The decline of the Lendbreen pass was probably caused by a combination of economic changes, climate change and late medieval pandemics(中世纪流行病), including the Black Death,” study co—author Lars Pilo explained. “When the local area recovered, things had changed, and the Lendbreen pass was lost to memory.”

“The objects are amazingly well preserved,” study co—author Espen Finstad added. “It is like they were lost a short time ago, not centuries or millennia ago.”

For archaeologists, the Lendbreen ice patch seems like a gift from the ancient past. But it's alarming that it's unwrapping itself so rapidly. "Global warming is leading to the melting of mountain ice worldwide," said Pilo. “Trying to save the remains of a melting world is a very exciting job—the finds are just an archaeologist's dream—but at the same time, it is also a job you cannot do without deep worry.”