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Woolly mammoth

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The woolly mammoth, known scientifically as Mammuthus primigenius, was a massive prehistoric mammal.

M. primigenius modified
M. primigenius modified

It lived from the Middle Pleistocene until its extinction during the Holocene epoch. This species was part of a long evolutionary lineage of mammoths. This line began with the African Mammuthus subplanifrons during the early Pliocene. The woolly mammoth is an extinct species, meaning it no longer exists on Earth.

Woolly mammoth model Royal BC Museum in Victoria
Woolly mammoth model Royal BC Museum in Victoria

Understanding this animal helps us learn how life adapts to changing climates. It was a key part of the mammoth steppe ecosystem. This habitat stretched across vast parts of northern Eurasia and North America.

To survive in freezing environments, the woolly mammoth had several physical adaptations.

Woolly mammoth with downward spiralling tusk
Woolly mammoth with downward spiralling tusk

It possessed a thick coat made of two different layers. The outer layer consisted of long guard hairs. Beneath those was a shorter, denser undercoat to trap heat. To prevent heat loss and frostbite, the mammoth had very short ears and a short tail.

Trunk of Sanga-Yuryakh Mammoth
Trunk of Sanga-Yuryakh Mammoth

Their large, curved tusks and trunks were essential for daily survival. They used these tools for foraging, fighting, and manipulating objects in their environment. Their diet consisted mainly of grasses and forbs. To process this tough food, they had four large molars. These teeth were replaced six times throughout an individual's life.

Mammoth molars compared
Mammoth molars compared

Evolutionary changes in mammoth teeth show how the species adapted over millions of years.

Mammoth molars compared
Mammoth molars compared

Early mammoth species had molars with very few enamel ridges, known as lamellar plates. As they evolved to eat more abrasive vegetation, the number of ridges increased. For example, the southern mammoth had 12 to 14 ridges. The steppe mammoth, which appeared about 1 million years ago, had 18 to 20 ridges. Finally, the woolly mammoth evolved molars with 26 ridges.

Mammoth molars compared
Mammoth molars compared

This dental evolution went hand-in-hand with changes to their skulls. Skulls became taller to hold the larger teeth. They also became shorter from front to back to reduce the weight of the head.

For a long time, people did not realize mammoths were extinct animals.

Boltunov mammoth
Boltunov mammoth

Native Siberians and Native Americans found remains and had various interpretations of them. In 1728, the British physician Hans Sloane studied fossilized teeth and tusks from Siberia.

Cuvier elephant jaw
Cuvier elephant jaw

Sloane recognized they were elephant-like but suggested they were moved by a Great Flood. In 1796, the French biologist Georges Cuvier made a major discovery. He identified the remains as a completely new species. He was also the first to argue that the species had gone extinct. This was a controversial idea at the time. In 1799, Johann Friedrich Blumenbach gave them the scientific name Elephas primigenius. This name translates to "the first-born elephant."

Scientists have gathered immense detail about mammoths through various physical remains.

Mammuthus primigenius Museum of Ancient Life 1
Mammuthus primigenius Museum of Ancient Life 1

They have studied frozen carcasses found in the permafrost of Siberia and North America. These finds include skeletons, teeth, stomach contents, and even dung. Researchers have also analyzed prehistoric cave paintings that depict them.

Wooly Mammoths
Wooly Mammoths

We know their approximate size by comparing them to modern elephants. A male could reach a shoulder height of 4.3 meters and weigh up to 6 tons. Females were slightly smaller, reaching 3.4 meters and weighing up to 4 tons.

Mammuthus primigenius Museum of Ancient Life 1
Mammuthus primigenius Museum of Ancient Life 1

Even newborn calves were large, weighing about 100 kilograms. Most individuals likely lived to be around 60 years old.

Genetic science has revealed the true family tree of the woolly mammoth.

Mammuthus phylogeny
Mammuthus phylogeny

DNA studies have confirmed that the Asian elephant is its closest living relative.

Mammuthus phylogeny
Mammuthus phylogeny

Research shows that the mammoth and Asian elephant lineages diverged between 5.8 and 7.8 million years ago. While they are different, they are still very similar. For instance, the woolly mammoth and the African elephant share between 98.55% and 99.40% of their DNA. In 2015, the completion of the mammoth genome project even started discussions about reviving the species. However, scientists say that reviving the mammoth is not currently feasible.

Human history is deeply connected to the life and death of the woolly mammoth.

Projectile points made from mammoth ivory
Projectile points made from mammoth ivory

Early humans lived alongside these giants during the Late Pleistocene. Humans hunted them for food and used their massive bones to build dwellings.

Mammoth House (Replica)
Mammoth House (Replica)

They also carved tools and art from mammoth ivory.

The mammoth population declined as the Ice Age ended. Most mainland populations died out around 10,000 years ago. However, small groups survived on islands for much longer. Isolated populations lived on St. Paul Island until 5,600 years ago. On Wrangel Island, they survived until 4,000 years ago.

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🖼️ Images & Media (22)
File:Cuvier elephant jaw.jpg
Cuvier elephant jaw.jpg
File:Boltunov mammoth.jpg
Boltunov mammoth.jpg
File:Mammuthus primigenius lectotypes.jpg
Mammuthus primigenius lectotypes.jpg
File:Mammoth molars compared.jpg
Mammoth molars compared.jpg
File:Mammuthus_phylogeny.svg
Mammuthus_phylogeny.svg
File:M._primigenius_modified.png
M._primigenius_modified.png
File:Woolly mammoth model Royal BC Museum in Victoria.jpg
Woolly mammoth model Royal BC Museum in...
File:Woolly mammoth with downward spiralling tusk.jpg
Woolly mammoth with downward spiralling tusk.jpg
File:Trunk of Sanga-Yuryakh Mammoth.jpg
Trunk of Sanga-Yuryakh Mammoth.jpg
File:Ice age fauna of northern Spain - Mauricio Antón.jpg
Ice age fauna of northern Spain -...
File:Donja vilica runastog mamuta.jpg
Donja vilica runastog mamuta.jpg
File:Worn Woolly mammoth tusk.png
Worn Woolly mammoth tusk.png

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