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Study provides experimental evidence of high harmonic generation producing quantum light

High harmonic generation (HHG) is a highly non-linear phenomenon where a system (for example, an atom) absorbs many photons of a laser and emits photons of much higher energy, whose frequency is a harmonic (that is, a multiple) of the incoming laser’s frequency. Historically, the theoretical description of this process was addressed from a semi-classical perspective, which treated matter (the electrons of the atoms) quantum-mechanically, but the incoming light classically. According to this approach, the emitted photons should also behave classically.

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Video: Man stabs car dealership employee, throws knife at Ill. officer before OIS

After instructing the man to drop the two knives he was holding, the man threw one at an officer, leading Dekalb officers to fire several shots at him

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Trump taps Kash Patel as FBI director

President-elect Donald Trump stated that Patel will play a key role in fighting gangs and stopping fentanyl trafficking at the border

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BWC: Suspected DUI driver slams into cruisers as Fla. officers conduct traffic stop

“This could have been much, much worse. Hopefully, he’ll get a stiffer penalty this time so this doesn’t happen again,” Sheriff Keith Pearson said of the driver, who has a prior DUI conviction

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Officers deploy pepper spray while working to break up brawl following Michigan-Ohio State rivalry game

“During the scuffle…officers representing Ohio and Michigan deployed pepper spray. OSUPD is the lead agency for games & will continue to investigate,” the agency stated

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Astronomers deal a blow to theory that Venus once had liquid water on its surface

A team of astronomers has found that Venus has never been habitable, despite decades of speculation that our closest planetary neighbor was once much more like Earth than it is today.

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Trump may cancel NASA’s powerful SLS Moon rocket—what that would mean for Elon Musk and the future of space travel

Since Donald Trump’s recent electoral victory, rumors and speculation have circulated that Nasa’s giant moon rocket, the Space Launch System (SLS), could be under threat. The rocket is one of several key elements needed for the US space agency’s Artemis program, which aims to return humans to the moon for the first time since 1972.

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NASA is seeking ideas for rescuing an astronaut from the moon

Space exploration is a dangerous business, especially when squishy living organisms, such as humans, are involved. NASA has always prided itself on how seriously it takes the safety of its astronauts, so as it gears up for the next big push in crewed space exploration, the Artemis program, it is looking for solutions to potentially catastrophic situations that might arise.

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A CubeSat mission to Phobos could map staging bases for a Mars landing

The moons of Mars are garnering increased attention, not only because they could provide a view of the solar system’s past but also because they could provide invaluable staging areas for any future human settlement on Mars itself. However, missions specifically designed to visit Phobos, the bigger of the two moons, have met with varying stages of failure.

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Interstellar objects can’t hide from Vera Rubin

We have studied the skies for centuries, but we have only found two objects known to come from another star system. The first interstellar object to be confirmed was 1I/2017 U1, more commonly known as ‘Oumuamua. It was discovered with the Panoramic Survey Telescope and Rapid Response System (Pan-STARRS) and stood out because of its large proper motion.

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Photonic processor could enable ultrafast AI computations with extreme energy efficiency

The deep neural network models that power today’s most demanding machine-learning applications have grown so large and complex that they are pushing the limits of traditional electronic computing hardware.

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Advances in fine-tuning electron behavior in quantum materials could fast-track next generation of tech

Physicists at Loughborough University have made an exciting breakthrough in understanding how to fine-tune the behavior of electrons in quantum materials poised to drive the next generation of advanced technologies.

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Experiment realizes quantum advantage in data storage with a photonic quantum processor

In recent years, quantum physicists and engineers have been trying to develop quantum computer processors that perform better than classical computers on some tasks. Yet conclusive demonstrations proving that quantum systems perform better than their classical counterparts (i.e., realizations of a quantum advantage) remain scarce, due to various experimental challenges.

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World’s oldest chess piece could be a rook dating back to the 7th century

YouTube Video Here: https://www.youtube.com/embed/n_Zv2Z8Tha0?feature=oembed&enablejsapi=1

The game of chess has been around for a very long time, both fascinating and frustrating players of every age for 1,500 years. Now, one of the oldest chess pieces in history may have been found by archaeologists in the Middle East.

Chess can trace its origins to India in the 6th century around 500 AD when it was commonly known as chaturaṅga during the Gupta Empire, considered by historians to have been the Golden Age of India.

From there, the game was taken westward by traders along the Silk Road, reaching the Middle East and then Europe where the rules would evolve over time and the name would change until the word “chess” was derived from the Persian word “shah” or king.

Up until now, the oldest chess pieces in the world were ivory pieces that had been excavated in Uzbekistan dating back to around 760 AD.

But University of Victoria-British Columbia archaeologist John Oleson believes a find made in 1991 at a site in Jordan should have the title of the oldest chess piece in the world.

The single sandstone piece looks exactly like an ancient rook in the same style in which they would have been carved based on rooks dating back to later centuries.

“A small sandstone object found in an Early Islamic context at Humayma (southern Jordan) in 1991 appears to be the earliest known archaeologically documented chess piece,” Oleson wrote in an abstract presentation of the piece to the American Schools of Oriental Research. “Although the shape, rectangular in section with splayed, horn-like projections at the top, resembles a Nabataean altar or betyl, parallels with Early Islamic chess pieces are far more convincing.”

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The rook piece found in 1991 at Humayma in Jordan, which dates back to the 7th century and could be the world’s oldest chess piece. Image via YouTube.

Indeed, surviving Early Islamic chess pieces share the same two horns at the top and served as rooks, which is also derived from a Persian word. Early Rooks represented chariots instead of castles like they do today, which makes a little more sense if you think of a chessboard as a battlefield.

“The object appears to be a “rook” (or “castle”) and has the typical abstract form for this playing piece favored in the Islamic world,” Oleson continued. “There are references to chess-playing in Islamic texts as early as A.H. 23/A.D. 643, and the game was popular throughout the Islamic world by the end of the Umayyad caliphate.”

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12th-century chess set from the Middle East featuring horned rooks. Image via the Met Museum.

One of the largest empires in history, the Umayyad caliphate was the second of four caliphates established after the death of Muhammad, the founder of Islam. Based in Damascus, Syria, the caliphate would usher in the Golden Age of Islam and became a center of science and philosophy, making it obvious as to why chess could so easily flourish in the region at the time.

Humayma is the modern name of the ancient trading post known as Hawara that had been founded in the 1st century by the Nabataean king Aretas III. A popular and strategic trading post, the city boasts Nabataean, Roman, Byzantine and Islamic influences that can still be seen today, including Roman baths, several Byzantine churches and an Islamic palace from the Umayyad period.

We know that chess was widely played by those of different cultural, religious and economic statuses. And in a trading post like Humayma, that means Christians and Muslims likely played chess together, as did the rich and poor and people who came from different regions. It’s like how sports bring people together today despite our differences.

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The ruins of the ancient trading post of Humayma in Jordan, where the chess piece was found in 1991. Image via Wikimedia.

“Several later abstract “rooks” from Jordan and elsewhere in the Near East, carved in stone, wood, or ivory, are nearly identical to the Humayma object in design and scale,” Oleson wrote. “Since the Humayma object was found in a seventh-century context, if the identification as a chess piece is correct, it would be the earliest known physical example for the simplified, abstract design, and possibly the earliest known example of a chess piece altogether.”

A 12th-century chess set from the Middle East, for example, include rooks carved in the same shape. While rooks of that time represented chariots, there was also a king represented by a throne, a vizier in the queen position represented by a smaller throne, a bishop represented by an elephant, a knight represented by a horse and pawns represented by multi-faceted hemispheres with knobs. Of course, the makeup of chess sets varied, so pieces came in many shapes, sizes, and representations.

For instance, a 12th-century Norwegian chess set featured several intricately detailed pieces known as the Lewis Chessman, a complete medieval chess set carved out of walrus ivory and found in Scotland in 1831.

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Lewis Chessman dating back to the 12th century displayed at the British Museum. Image via Wikimedia.

Queen’s Chess

By the 10th century, the queen would replace the vizier piece and would become the most powerful piece on the board by the 15th century, giving rise to the term “Queen’s Chess” to describe the game.

Oleson speculates that chess had made its way to the trading post by way of merchants and diplomats.

“Since the game probably was carried westward from India by the movement of merchants and diplomats, it is no surprise that early evidence for it should be found at a site on the busy Via Nova Traiana,” he noted. “While resident at Humayma, the Abbasid family had kept itself abreast of events in Syria and Iraq along this same route.”

The Via Nova Traiana was an ancient road built by the Romans, starting during the reign of Emperor Trajan and being completed under Emperor Hadrian, who also commissioned the building of Hadrian’s Wall in the United Kingdom.

Ancient Levant routes
The Via Maris (purple), King’s Highway (red), and other ancient Levantine trade routes, c. 1300 BCE. by Briangotts via Wikimedia Commons (CC BY-SA 3.0)

The Abbasid family Oleson speaks of is the Abbasid Caliphate, the third of the Islamic caliphates that ruled the region after overthrowing the Umayyad caliphate. They would rule the empire politically until around the mid-1200s and would be able to claim religious authority until the Ottomans conquered Egypt in 1517.

By then, chess was well established.

If further analysis proves that this piece is a rook dating back to the 7th century, it would be the oldest chess piece in the world. And seeing as how Oleson currently stores the piece in his basement, he should strongly consider moving it to a more secure place because a Lewis Chessmen piece recently sold for over $700,000. An older piece could draw a similar amount or higher. Nevertheless, this is an extraordinary piece that helps tell the story of chess and, frankly, it belongs in a museum where all chess enthusiasts can enjoy it.

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Featured Image: Lewis chessmen by Nachosan via Wikimedia Commons (CC BY-SA 3.0)

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5,000-year-old Peruvian pyramid yields grisly clues of human sacrifice

YouTube Video Here: https://www.youtube.com/embed/8XpymxNvyIg?feature=oembed&enablejsapi=1″ width=”560

When they found a mysterious pyramid structure in Peru recently, archaeologists knew they had located something of incredible significance, but upon closer inspection, they came to realize that their discovery holds a dark secret that appears to point to the ancient practice of human sacrifice which was once carried out across most of South America.

According to Ancient Origins:

“The amazing discovery was made at the Sechin Archaeological Project, in the northern province of Casma in the Ancash region. This historic site dates back over 5000 years and it is believed to have been the center of an enigmatic prehistoric society known as the Sechin culture.

“Little is known about this culture, but it constructed some of the first monumental buildings in the Americas. Many experts believe that it even may be the first known civilization in the Andes.”

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A previously discovered pendant made by the Sechin culture. Right: The newly unearthed Peruvian pyramid was also made by the Sechin people. (Via the Lombard Museum & Andina)
Evidence of human sacrifices?

Once excavation of the site began, Sechin Archaeological Project researchers began noting that they had to dig some 18 feet to find the pyramid structure, and had a very unique design:

“This structure consists of a series of steps that are made out of slabs and stones and are similar to a step-pyramid. It is an estimated 10 feet (3.05 meters) high and 15 feet (4.57 meters) wide.”

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The Peruvian pyramid consists of a series of steps (Via Andina)

After speculating that the massive pyramid was likely the seat of government in the Sechin culture, researchers then came to the darker use of the structure:

“Archaeologist Monica Suarez, the coordinator at the Archaeological Project, stated, ‘It served a ceremonial purpose, but we need to make further analysis.’ Many cultures in the ancient Andes used similar buildings for rites and sacrifices. Living and Traveling in Peru reports that stepped pyramids were ‘aimed at attaining higher or elevated levels of spirituality.’”

See the finds from Ancient Architects

Grisly discoveries

Near the pyramid, members of the archaeological team began finding clues that certainly seem to point toward a bloody past, including two skulls, one of which belonged to an adult and the other to a young child.

But that was just one of the horrific things the researchers found:

“At the side of the structure they found a skeleton that appears to have been dismembered. This is evidence that a person may have had his or her limbs cut off while still alive or post-mortem.”

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Two skulls and a dismembered skeleton were found by researchers (Via Andia)

Finding the skulls and dismembered skeleton adds credence to the theories of human sacrifice, according to Andina. The possibility also exists that the sacrifices took place on the stepped structure, and it has long been known that human sacrifice was a common occurrence in the Andes before the Spanish arrived.

But there are alternate theories, too, and those point to a more practical purpose for the structure:

“Researchers at the archaeological park believe that it is also possible ‘that the stepped, pyramid-shaped structure served as a ladder to get to a higher level.’ The nature of the stepped structure and its location may mean that it was used to access the center of the ancient site. It may have allowed the inhabitants of the massive complex to approach the central building.”

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Sechin carvings via YouTube
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Sechin carvings via YouTube
Mysteries of the Sechin

Along with the possibility of human sacrifice are hints that the people who constructed the pyramid were proud of their work, even leaving a sort of signature that can be seen by us thousands of years later:

“It appears that when the mud-bricks were still wet the workers deliberately left impressions with their fingers. These fingerprints can be viewed as workers signing their work.”

Pendants
Pendants made by the Sechin people (Via Lombard Museum)

Research continues on the Peruvian pyramid structure, and all of the human remains are undergoing extensive testing. Hopefully, that will give us a greater insight into mysterious Sechin people who populated the region thousands of years ago.

This video has more on the Sechin people and their culture:

YouTube Video Here: https://www.youtube.com/watch?v=P8M4xrmPzU8&feature=emb_logo


Featured Image: Screenshots via YouTube

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