 The Yukagir Mammoth head | |
| Common name | Yukagir Mammoth |
|---|---|
| Species | Woolly mammoth |
| Age | c. 22,500 years |
| Place discovered | Sakha, Russia |
| Date discovered | 2002 |
The Yukagir Mammoth is a frozen adult male woolly mammoth specimen found in the autumn of 2002 in northern Yakutia, Arctic Siberia, Russia, and is considered to be an exceptional discovery. [1] The nickname refers to the Siberian village near where it was found. [2]
The head of this specimen, entirely covered with skin and very well-preserved, was first discovered in 2002. After hearing about the discovery, a polar explorer carried out the expedition with his team to extract the remains from the permafrost. One of the members of the team was the French polar explorer, "Mammoth-Hunter" Bernard Buigues, known for carrying out expeditions to the North Pole, Siberia since the 1990s. [1] It took three excavation trips to gather and put the Yukagir fossil together. Although mammoth remains are not a rarity, few are as notable as this specimen. [3]
The discovery of the Yukagir Mammoth, is described as one of the greatest paleontological discoveries of all time as it revealed that woolly mammoths had temporal glands between the ear and the eye [1] and the well-preserved remains of the Yukagir Mammoth, such as the foot, shows that the soles of the feet contained many cracks that would have helped in gripping icy surfaces during locomotion. Like modern elephants, woolly mammoths were Paenungulata , meaning they walked on their toes and had large, fleshy pads behind the toes. Among other discoveries, the Yukagir Mammoth showed that the species had suffered from spondylitis in two vertebrae, and osteomyelitis which is also known from some other specimens. Several specimens have healed bone fractures, showing that the animals had survived these injuries. [4]
The Yukagir mammoth's permafrost tomb preserved its head, tusks, front legs, and parts of its stomach and intestinal tract. From its bones and enormous tusks, the scientists who rushed to the site (including mammoth experts Dick Mol and Larry Agenbroad) guessed that the woolly mammoth was an old male that when alive stood over nine feet tall at the shoulder and weighed four to five tons. Furthermore, scientists were able to discover that the main component of the Yukagir's final meal was grass, including stems from the family Poaceae. Remarkably, like many of the dung's floral remains, the stems have retained their color and shape ever since the woolly mammoth tore them from the tundra roughly 22,500 years ago. [5] Based on the Yukagir Mammoth's last meal, scientists were able to discover facts about the elephant's ancestors and conduct an environmental reconstruction [6] showing fungi's importance in the process of nutrient cycling in the mammoth steppe. [7]
The following types of research were agreed upon at the meeting of the Scientific Council: [8]
Since the Yukagir Mammoth has been found, it has been transported globally for informative and educational purposes. The specimen was displayed in an effort to understand the link between life and the global environment with the theme of the Expo - "Nature's Wisdom." To keep it preserved, the exhibition room needed to be kept at -15 °C. The 2005 World Expo was held in Aichi, Japan at took place on November 17–18, 2005. [9]
A mammoth is any species of the extinct elephantid genus Mammuthus. They lived from the late Miocene epoch into the Holocene until about 4,000 years ago, with mammoth species at various times inhabiting Africa, Europe, Asia, and North America. Mammoths are distinguished from living elephants by their spirally twisted tusks and in at least some later species, the development of numerous adaptions to living in cold environments, including a thick layer of fur.
The woolly rhinoceros is an extinct species of rhinoceros that inhabited northern Eurasia during the Pleistocene epoch. The woolly rhinoceros was a member of the Pleistocene megafauna. The woolly rhinoceros was covered with long, thick hair that allowed it to survive in the extremely cold, harsh mammoth steppe. It had a massive hump reaching from its shoulder and fed mainly on herbaceous plants that grew in the steppe. Mummified carcasses preserved in permafrost and many bone remains of woolly rhinoceroses have been found. Images of woolly rhinoceroses are found among cave paintings in Europe and Asia. The range of the woolly rhinoceros contracted towards Siberia beginning around 17,000 years ago, with the youngest known records being around 14,000 years old in northeast Siberia, coinciding with the Bølling–Allerød warming, which likely disrupted its habitat, with environmental DNA records possibly extending the range of the species around 9,800 years ago. Its closest living relative is the Sumatran rhinoceros.
The steppe bison or steppe wisent is an extinct species of bison. It was widely distributed across the mammoth steppe, ranging from Western Europe to eastern Beringia in North America during the Late Pleistocene. It is ancestral to all North American bison, including ultimately modern American bison. Three chronological subspecies, Bison priscus priscus, Bison priscus mediator, and Bison priscus gigas, have been suggested.
The pygmy mammoth or Channel Islands mammoth is an extinct species of dwarf mammoth native to the northern Channel Islands off the coast of southern California during the Late Pleistocene. It was descended from the Columbian mammoth of mainland North America, which are suggested to have colonised the islands around 250–150,000 years ago. At only 1.72–2.02 m (5.6–6.6 ft) tall at the shoulder, it was around 17% the size of its mainland ancestor. The species became extinct around 13,000 years ago, co-inciding with major environmental change and the arrival of humans in the Channel islands.
The Columbian mammoth is an extinct species of mammoth that inhabited North America from southern Canada to Costa Rica during the Pleistocene epoch. The Columbian mammoth descended from Eurasian steppe mammoths that colonised North America during the Early Pleistocene around 1.5–1.3 million years ago, and later experienced hybridisation with the woolly mammoth lineage. The Columbian mammoth was among the last mammoth species, and the pygmy mammoths evolved from them on the Channel Islands of California. The closest extant relative of the Columbian and other mammoths is the Asian elephant.
The mammoth steppe, also known as steppe-tundra, was once the Earth's most extensive biome. During glacial periods in the later Pleistocene it stretched east-to-west, from the Iberian Peninsula in the west of Europe, across Eurasia to North America, through Beringia and northwest Canada; from north-to-south, the steppe reached from the Arctic southward to southern Europe, Central Asia and northern China. The mammoth steppe was cold and dry, and relatively featureless, though climate, topography, and geography varied considerably throughout. Certain areas of the biome—such as coastal areas—had wetter and milder climates than others. Some areas featured rivers which, through erosion, naturally created gorges, gulleys, or small glens. The continual glacial recession and advancement over millennia contributed more to the formation of larger valleys and different geographical features. Overall, however, the steppe is known to be flat and expansive grassland. The vegetation was dominated by palatable, high-productivity grasses, herbs and willow shrubs.
Mammuthus trogontherii, sometimes called the steppe mammoth, is an extinct species of mammoth that ranged over most of northern Eurasia during the Early and Middle Pleistocene, approximately 1.7 million to 200,000 years ago. One of the largest mammoth species, it evolved in East Asia during the Early Pleistocene, around 1.8 million years ago, before migrating into North America around 1.5 million years ago, and into Europe during the Early/Middle Pleistocene transition, around 1 to 0.7 million years ago. It was the ancestor of the woolly mammoth and Columbian mammoth of the later Pleistocene.
The Sopkarga mammoth, alternately spelled Sopkarginsky mammoth, and informally called Zhenya, after the nickname of its discoverer, is a woolly mammoth carcass found in October 2012. It was discovered 3 kilometres (2 mi) away from the Sopkarga polar weather station on the Taymyr Peninsula in Russia. The Moscow News refers to it as the best preserved mammoth find in the past 100 years.
Lyuba is a female woolly mammoth calf who died c. 42,000 years ago at the age of 30 to 35 days. She was formerly the best preserved mammoth mummy in the world, surpassing Dima, a male mammoth calf mummy which had previously been the best known specimen.
The Adams mammoth is the first woolly mammoth skeleton with skin and flesh still attached to be recovered by scientists. The mostly complete skeleton and flesh were discovered in 1799 in northeastern Siberia by Ossip Shumachov, an Evenki hunter and subsequently recovered in 1806 when Russian botanist Mikhail Adams journeyed to the location and collected the remains.
The woolly mammoth is an extinct species of mammoth that lived from the Middle Pleistocene until its extinction in the Holocene epoch. It was one of the last in a line of mammoth species, beginning with the African Mammuthus subplanifrons in the early Pliocene. The woolly mammoth began to diverge from the steppe mammoth about 800,000 years ago in Siberia. Its closest extant relative is the Asian elephant. The Columbian mammoth lived alongside the woolly mammoth in North America, and DNA studies show that the two hybridised with each other.
Sergey Aphanasievich Zimov is a Russian geophysicist who specialises in arctic and subarctic ecology. He is the Director of Northeast Scientific Station, a senior research fellow of the Pacific Institute for Geography, and one of the founders of Pleistocene Park. He is best known for his work in advocating the theory that human overhunting of large herbivores during the Pleistocene caused Siberia's grassland-steppe ecosystem to disappear and for raising awareness as to the important roles permafrost and thermokarst lakes play in the global carbon cycle.
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