What Is An Ice Age?

When you read that, an image probably came to mind: giant glaciers, people huddling for warmth, maybe a giant woolly mammoth or two. The problem with that definition of "Ice Age" is it defines what life is like now on Earth as "normal" and giant glaciers over the north and south pole as "abnormal." But is that true? Are we, in fact, living in a period of relative coolness? Is right now an "abnormal" Earth?

A better description of an ice age would be that it’s a long stretch of time in which both the atmosphere and the planet’s surface have a low temperature, resulting in the presence of polar ice sheets and mountainous glaciers. An Ice Age can last for several million years. Within the Ice Age period, the Earth isn't uniformly covered in snow. There are periods of glaciation, characterized by ice sheet and glacier expansion over the face of the planet, and interglacial periods, where we would have an interval of several thousand years of warmer temperatures and receding ice. Turns out just the presence of ice caps on the north and south pole is abnormal! What we currently live in is an "interglacial period" in the middle of an Ice Age!

Dice Have Gotten More Fair Since Ancient Times

A survey of cube-shaped dice dating back to the Roman era finds that they were not designed to have an equal chance of landing on different numbers until the Renaissance, according to researchers from UC Davis and the American Museum of Natural History. Roman-era dice, the researchers found, were a mess when it came to shape. They were made from a variety of materials, such as metal, bone and clay, and no two were shaped entirely alike. Many were visibly lumpy and lopsided, with the 1 and 6 on opposite sides that were more likely to roll up. In the Dark Ages after the fall of the Western Roman Empire, between 400 CE and 1100 CE, dice seem to have grown rare. Relatively few have been found from this period. Dice reemerged in the Middle Ages, and at that point were a little more regular in shape. But they still weren't fair -- anyone playing dice would have had slightly higher chances of getting certain numbers, depending on how uneven the dice were made.

The researchers suggest that the popularization of "scientific" thinking may have helped dice rolls become near-chance during the Renaissance. "People like Galileo and Blaise Pascal were developing ideas about chance and probability, and we know from written records in some cases they were actually consulting with gamblers," Jelmer Eerkens of UC Davis said. "We think users of dice also adopted new ideas about fairness, and chance or probability in games."

Riverside Cliff Tombs Found In Southwest China

More than 200 cliff cave burial sites have been identified in Zhengxing Township in Chengdu, in southwest China's Sichuan Province.  The 200 burial sites number is deceptive; they are not just holes in the ground, but a cluster of hewn rooms, carved out of the cliffs overlooking the Jinjiang River. Some of the tombs have up to seven chambers with tunnels as long as 20 meters (65 feet).

Unfortunately, the tombs appear to have been previously looted. Bummer. But in what should be considered a small miracle, a large number of artifacts were recovered despite the looting; initial estimates are that around 1,000 gold, silver and bronze artifacts are still there. The tombs date between 206 BCE and 420 CE -- the Han Dynasty through the Wei-Jin period.

Underwater Route Between Prehistoric Cenotes Found In Mexico

Researchers from Mexico’s National Institute of Anthropology and History have discovered a route through underwater limestone caves connecting the Sac Actun cenote and the Dos Ojos cenote. Maya pottery, human bones, and the bones of elephant-like creatures, giant sloths, bears, tigers, and extinct species of horses, all likely from around the end of the last Ice Age, have been found in the tunnel-like caves. Exploring them and finding artifacts can be difficult, though: the underwater caves range in width from 400 feet to just three feet.

New Technology to Open Unopenable Ancient Texts is Being Tested on A Burned Book for the First Time

This is a book, written sometime between 400 and 600 CE, in the Egyptian language Coptic. Unfortunately no one has been brave enough to open it. The charred book, named M.910 after its library accession number, was fused together by a cinder, which sank through many of its pages, binding the parchment leafs together and making opening the book dangerous. Thanks to modern technology, however, we do not need to open the codex to read its contents. A fine-detail CT scan of the codex was completed in December 2017. Previous fine-detail CT scans have worked, famously with a charred lump from En-Gedi in Israel, but that was a scroll. All the writing was on one side of the scroll. This codex has pages, with writing on both sides. Although tests of mock books worked, we will not know for a while if the real test -- scanning M.910 -- worked as well.

The Sassanian Empire's Claim To Fame

Who were the successors to the Roman's archrivals, the Parthians? You probably guessed from the title -- the Sassanians. It is widely considered the last "true" Persian Empire. Why? Answer

Cemetery Dating To Two Ancient Peruvian Cultures Uncovered

An amazing new site has been found in Peru: an undisturbed cemetery with burials from the Viru Period (200 BCE - 500 CE) and the earlier Salinar Period (400 BCE - 200 BCE). The richer graves actually date to the Salinar Period, with gold artifacts, ritual objects, and a stone mace head. Unfortunately, those skeletons also show severe injuries. Located in Huanchaco, on Peru's north coast, the site is at what is essentially a fishing village. Such a concentration of high-status burials shows that the Salinar period had strong social differentiation, even in a small village.

  Fox head ornament from the Moche civilization, in Peru. Made of gilded copper — which has turned green over the centuries — and shell. Circa 390 to 450 CE.

New Technology Used To Examine An Old Site

Tsuzuraozaki Kotei Iseki is an interesting archaeological site in Japan: it is entirely underwater! The site, in Lake Biwako under about 200 feet (61 meters) of water, is known to be home to a wide variety of pottery dating from as early as 8000 BCE through the 1100s CE. Japanese archaeologists recently used a robot (surprise, surprise) to explore Tsuzuraozaki Kotei Iseki. It spotted a Haji pottery urn, measuring about a foot long and dating to the 500s to 700s CE, and shallow, grayish-black bowls thought to be Sue pottery, made in Japan and southern Korea for funeral and ritual use beginning in the 400s CE.

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    HISTORICAL NON-FICTION

    By Lillian Audette

    This blog is a collection of the interesting, the weird, and sometimes the need-to-know about history, culled from around the internet. It has pictures, it has quotes, it occasionally has my own opinions on things. If you want to know more about anything posted, follow the link at the "source" on the bottom of each post. And if you really like my work, buy me a coffee or become a patron!

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