Post by rock on Apr 26, 2019 18:39:35 GMT 5
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Standing at 11 Feet: World's Largest Known Bear Unearthed
The largest land predator of its time, the South American giant short-faced bear (Arctotherium angustidens), in comparison to a person.
Credit: Soibelzon, Schubert, Journal of Paleontology.
The fossils of the largest known bear to have ever lived have been found, a giant that was the most powerful land carnivore of its time, scientists said.
The remains were unearthed during the construction of a hospital in La Plata City, Argentina. It was a South American giant short-faced bear (Arctotherium angustidens), the earliest and largest member of its genus (its group of species of bears). This titan lived between 2 million to 500,000 years ago, with its closest living relative being the spectacled bear (Tremarctos ornatus) of South America.
Based on measurements of the fossil's leg bones and equations used to estimate body mass, the researchers say the bear would have stood at least 11 feet tall (3.3 meters) on its hind legs and would have weighed between 3,500 and 3,855 pounds (1,588 and 1,749 kilograms). In comparison, "the largest record for a living bear is a male polar bear that obtained the weight of about 2,200 pounds (1,000 kg)," said researcher Leopoldo Soibelzon, a paleontologist at the La Plata Museum.
"During its time, this bear was the largest and most powerful land predator in the world," researcher Blaine Schubert, a paleontologist at East Tennessee State University in Johnson City, told LiveScience. "It's always extremely exciting to find something that's the largest of its class — and not just a little bit larger, but quite a bit larger."
Although this bear probably had an omnivorous diet, flesh likely dominated. Megafauna or large creatures likely played an important role in what it ate, and potentially included giant ground sloths, now-extinct relatives of elephants, camels, tapirs, and armadillo-like creatures known as glyptodonts.
"This does not imply that active hunting was its primary strategy for feeding, since its large size and great power may have permitted the bear to fight for prey hunted by other Pleistocene carnivores such as the saber-toothed cat," Schubert said. "Scavenging megaherbivore carcasses was probably another frequent way of feeding."
The research team's analysis of the bear's bones suggests it was an old male that survived a number of serious injuries during life. These might have come from battles with other males, while hunting megafauna, or during fights with other carnivores over a carcass.
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short faced bear
The giant short-faced bear (also referred to as the bulldog bear) lived in North America from approximately 1.8 million years ago until about 11,000 years ago.
There were two species of Short-Faced Bears; Arctodus pristinus and Arctodus simus. Arctodus simus is the largest and is called the Giant Short-Faced Bear. It is one of the biggest mammalian predators ever to roam the earth.
This now extinct massive predator lived in North America across a wide range stretching from Alaska to as far south as Mississippi.
They get their name, short-faced bear, due to the shape of their skulls. It appears from the skull that they had a short snout; but this was not the case.
From fossil evidence it seems that this predator was most abundant in California.
These bear's genus name, Arctodus, is derived from Greek and means "bear tooth".
Around 800,000 years ago, during the Kansan glaciation, the Giant Short-Faced Bears became abundant in North America; in fact it became the most abundant bear in North America for thousands of years.
The first fossils of this species were discovered in Northern California at a site named Potter Creek Cave. In this limestone cave numerous fossils of various extinct animals were unearthed.
These huge bears were definitely carnivores and would have to have eaten 35 pounds (16 kilograms) of meat daily to survive. There is also evidence that they would eat plants from time to time as do modern day bears.
These animals were big but were also built for speed. It fact it is the fastest bear that ever existed. It is believed they could run up to 40 miles per hour (64.4 Kilometers per Hour).
There are several theories on how the Giant Short-Faced Bear hunted. These bears could run very fast which might have enabled them to run down even fast prey such as horses. However some experts believe its large size and inability to make sharp turns would have meant it would not be able to chase down most prey. These experts suggest it may have waited for other predators like the Dire Wolf and American Lion to make a kill and then moved in scaring the other predators away and stealing their kills.
Why did the Giant Short-Faced Bear become extinct? The answer is not known for certain but two main reasons are believed to have contributed to its extinction. The first is that their extinction correlated with the mass extinction of many species which they depended on as a food source. At the end of the last ice age there was what has been called a mega fauna extinction brought about by climate changes. The second reason that may have contributed to this animals demise was the fact that humans were increasingly populating their habitats and as the humans hunting skills increased they were able to dominate the bears in the competition for limited food supplies.Standing on all four legs its height would be 8 - 10 feet (2.44 - 3.05 meters).
The Short-Faced Bear could stand up to 12 feet high when standing on its hind legs although 8 to 10 feet is believed to be more common.
It is estimated that these extinct bears could weigh an amazing 1,984 pounds (900 kilograms). With at least one specimen estimated to weigh 2109 pounds (957 kilograms).
The Giant Short-Faced Bear had feet that pointed forward, most bears have feet that point inward. This enabled it to run fast.
This extinct predator had long sharp canine teeth along with several big sharp molars; perfect for ripping through the meat of its prey.
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Standing at 11 Feet: World's Largest Known Bear Unearthed
The largest land predator of its time, the South American giant short-faced bear (Arctotherium angustidens), in comparison to a person.
Credit: Soibelzon, Schubert, Journal of Paleontology.
The fossils of the largest known bear to have ever lived have been found, a giant that was the most powerful land carnivore of its time, scientists said.
The remains were unearthed during the construction of a hospital in La Plata City, Argentina. It was a South American giant short-faced bear (Arctotherium angustidens), the earliest and largest member of its genus (its group of species of bears). This titan lived between 2 million to 500,000 years ago, with its closest living relative being the spectacled bear (Tremarctos ornatus) of South America.
Based on measurements of the fossil's leg bones and equations used to estimate body mass, the researchers say the bear would have stood at least 11 feet tall (3.3 meters) on its hind legs and would have weighed between 3,500 and 3,855 pounds (1,588 and 1,749 kilograms). In comparison, "the largest record for a living bear is a male polar bear that obtained the weight of about 2,200 pounds (1,000 kg)," said researcher Leopoldo Soibelzon, a paleontologist at the La Plata Museum.
"During its time, this bear was the largest and most powerful land predator in the world," researcher Blaine Schubert, a paleontologist at East Tennessee State University in Johnson City, told LiveScience. "It's always extremely exciting to find something that's the largest of its class — and not just a little bit larger, but quite a bit larger."
Although this bear probably had an omnivorous diet, flesh likely dominated. Megafauna or large creatures likely played an important role in what it ate, and potentially included giant ground sloths, now-extinct relatives of elephants, camels, tapirs, and armadillo-like creatures known as glyptodonts.
"This does not imply that active hunting was its primary strategy for feeding, since its large size and great power may have permitted the bear to fight for prey hunted by other Pleistocene carnivores such as the saber-toothed cat," Schubert said. "Scavenging megaherbivore carcasses was probably another frequent way of feeding."
The research team's analysis of the bear's bones suggests it was an old male that survived a number of serious injuries during life. These might have come from battles with other males, while hunting megafauna, or during fights with other carnivores over a carcass.
short faced bear
The giant short-faced bear (also referred to as the bulldog bear) lived in North America from approximately 1.8 million years ago until about 11,000 years ago.
There were two species of Short-Faced Bears; Arctodus pristinus and Arctodus simus. Arctodus simus is the largest and is called the Giant Short-Faced Bear. It is one of the biggest mammalian predators ever to roam the earth.
This now extinct massive predator lived in North America across a wide range stretching from Alaska to as far south as Mississippi.
They get their name, short-faced bear, due to the shape of their skulls. It appears from the skull that they had a short snout; but this was not the case.
From fossil evidence it seems that this predator was most abundant in California.
These bear's genus name, Arctodus, is derived from Greek and means "bear tooth".
Around 800,000 years ago, during the Kansan glaciation, the Giant Short-Faced Bears became abundant in North America; in fact it became the most abundant bear in North America for thousands of years.
The first fossils of this species were discovered in Northern California at a site named Potter Creek Cave. In this limestone cave numerous fossils of various extinct animals were unearthed.
These huge bears were definitely carnivores and would have to have eaten 35 pounds (16 kilograms) of meat daily to survive. There is also evidence that they would eat plants from time to time as do modern day bears.
These animals were big but were also built for speed. It fact it is the fastest bear that ever existed. It is believed they could run up to 40 miles per hour (64.4 Kilometers per Hour).
There are several theories on how the Giant Short-Faced Bear hunted. These bears could run very fast which might have enabled them to run down even fast prey such as horses. However some experts believe its large size and inability to make sharp turns would have meant it would not be able to chase down most prey. These experts suggest it may have waited for other predators like the Dire Wolf and American Lion to make a kill and then moved in scaring the other predators away and stealing their kills.
Why did the Giant Short-Faced Bear become extinct? The answer is not known for certain but two main reasons are believed to have contributed to its extinction. The first is that their extinction correlated with the mass extinction of many species which they depended on as a food source. At the end of the last ice age there was what has been called a mega fauna extinction brought about by climate changes. The second reason that may have contributed to this animals demise was the fact that humans were increasingly populating their habitats and as the humans hunting skills increased they were able to dominate the bears in the competition for limited food supplies.Standing on all four legs its height would be 8 - 10 feet (2.44 - 3.05 meters).
The Short-Faced Bear could stand up to 12 feet high when standing on its hind legs although 8 to 10 feet is believed to be more common.
It is estimated that these extinct bears could weigh an amazing 1,984 pounds (900 kilograms). With at least one specimen estimated to weigh 2109 pounds (957 kilograms).
The Giant Short-Faced Bear had feet that pointed forward, most bears have feet that point inward. This enabled it to run fast.
This extinct predator had long sharp canine teeth along with several big sharp molars; perfect for ripping through the meat of its prey.
