Woolly mammoth

The woolly mammoth (Mammuthus primigenius) was 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 living relative today is the Asian elephant. The Columbian mammoth (Mammuthus columbi) lived alongside the woolly mammoth in North America, and DNA studies show that the two hybridised with each other.

The woolly mammoth was well adapted to cold environments during glacial periods, including the last ice age. It had fur, with long guard hairs and a shorter undercoat, and its ears and tail were short to prevent frostbite. It had long, curved tusks and used its trunk for grabbing things, fighting, and finding food. The woolly mammoth mainly ate forbs and grasses.

Woolly mammoths lived alongside early humans, who hunted them for food and used their bones and tusks to make art, tools, and homes. The species gradually disappeared at the end of the Late Pleistocene, with the last groups on mainland Siberia dying out around 10,000 years ago. Smaller groups survived on St. Paul Island until 5,600 years ago and on Wrangel Island until 4,000 years ago. Today, scientists have studied the mammoth genome, sparking discussions about the possibility of reviving the woolly mammoth, though such ideas remain theoretical.

Taxonomy

Remains of woolly mammoths were known to native Siberians and Native Americans. They had their own ideas about these old bones. Later, scientists studied these remains. The first scientist to look at woolly mammoth bones was a British doctor named Hans Sloane in 1728. He saw that these bones were from elephants but thought they might have been buried during a big flood.

In 1796, a French scientist named Georges Cuvier said that woolly mammoths were a special kind of animal that no longer existed. This was a new idea at the time. The scientific name Mammuthus primigenius was given to the woolly mammoth in 1799. The word “mammoth” probably comes from an old Siberian word meaning “earth-horn.” By the early 1900s, scientists used many names for extinct elephants, but later work made this simpler.

Evolution

Mammoths are part of a group of animals called proboscideans. This group also includes today’s elephants. The family Elephantidae, which includes today’s elephants and mammoths, first appeared in Africa about 6 million years ago. The woolly mammoth separated from the Asian elephant about 5 to 7 million years ago. Scientists have studied mammoth DNA and found that woolly mammoths and Asian elephants are very closely related.

Subspecies and hybridisation

Scientists have found many different kinds of mammoths. Sometimes these kinds mixed together, creating hybrids. For example, Columbian mammoths and woolly mammoths sometimes had babies together. Studies of ancient mammoth DNA show that these two types shared genes, especially in areas where they lived near each other. This mixing happened over many thousands of years.

Description

The woolly mammoth was a big, elephant-like animal that lived during the ice age. Males could grow as tall as about 3 meters (10 feet) at the shoulder and weigh between 4.5 and 6 tons. Females were smaller, about the size of today’s elephants. Their bodies were made to stay warm in cold places, with thick fur and fat.

Woolly mammoths had long, curved tusks, which were really long teeth, often over 3 meters (10 feet) in males. Their teeth were made for eating tough plants, with layers that wore down while they chewed. These mammoths also had small ears and special skin flaps to keep out the cold.

Palaeobiology

Adult woolly mammoths could defend themselves from predators with their tusks, trunks, and size. Young mammoths and weaker adults could be attacked by animals like wolves, cave hyenas, and large felines. The tusks might have been used in fights over territory or mates. Because of their shape, the tusks were better for hitting than for stabbing.

Woolly mammoths were likely very social and lived in matriarchal (female-led) family groups, similar to modern elephants. They moved with the seasons, with some groups living in southern Poland during winter and moving to the midlands during summer.

Adaptations to cold

The woolly mammoth was very well suited to cold weather. In addition to their fur, they had fat storage in their neck and withers to help them survive when food was scarce in winter. Their haemoglobin was special, with changes that helped them carry oxygen better and stay warm.

Diet

Woolly mammoths ate plants such as forbs, grasses, and sedges. They also ate herbaceous plants, flowering plants, shrubs, mosses, and tree matter. A grown mammoth weighing 6 tonnes needed to eat about 180 kg (400 lb) each day.

Life history

Woolly mammoths probably lived about as long as modern elephants, which can live up to 60 years. They kept growing after they became adults, with males growing until they were 40 and females until they were 25. Woolly mammoths were thought to be able to have babies when they were about 18–20 years old.

Palaeopathology

Scientists have found signs of some bone diseases in woolly mammoths. The most common was osteoarthritis. Problems with the molars were also often found in mammoth fossils.

Distribution and habitat

The woolly mammoth lived in an area called the "mammoth steppe" or "tundra steppe." This place covered northern Asia, parts of Europe, and northern North America during the last ice age. It looked like the grassy steppes of modern Russia but had many plants, such as grasses, sedges, shrubs, and flowers. Trees were mostly found in the south.

This habitat had many big animals, like the woolly rhinoceros, wild horses, and bison. The southernmost woolly mammoth was found in Shandong province of China, about 33,000 years ago. In Europe, the southernmost remains are from the Depression of Granada in Spain, around the same time. Studies show that woolly mammoths lived in two groups, with one group going extinct earlier in the high Arctic and another group living in a larger area.

Relationship with humans

Modern humans and Neanderthals lived at the same time as woolly mammoths. These big elephants were very important to people who lived during the ice age. People used mammoth bones for tools and to build things. For example, Neanderthals used mammoth bones to make huts.

Woolly mammoths are often shown in old art, like cave paintings and small carvings. They are one of the most common animals shown in this art, along with horses and bison. These paintings and carvings were made many thousands of years ago. Some of the biggest mammoth drawings are very large and were found deep inside caves.

Extinction

Most woolly mammoth populations disappeared during the late Pleistocene and mid-Holocene. This was part of a larger event called the Late Pleistocene extinctions. Scientists debate whether hunting by humans or changes in climate was the main reason for their disappearance, or if it was a mix of both.

Large mammals like mammoths are more vulnerable to extinction because they have smaller populations and produce fewer babies. As the climate changed, the cold lands that mammoths needed shrank. By the end of the last icy period, around 15,000 years ago, the grasslands turned into wetter forests, which were not good homes for mammoths.

Different groups of woolly mammoths went extinct at different times. Most were gone by about 10,000 years ago, but some survived much longer. In Britain, they lived until around 14,000 years ago. On Wrangel Island in the Arctic Ocean, a small group stayed until about 4,000 years ago. Other small groups survived on islands like St. Paul Island until around 5,600 years ago. These last survivors faced tough conditions, which likely helped them disappear.

Fossil specimens

Further information: List of mammoth specimens

Woolly mammoth fossils have been found in many places, such as old rivers, lakes, and even in the North Sea. These fossils are often broken and rarely include soft parts like skin or organs.

Scientists used to think places with many mammoth bones were special spots where mammoths went to die. But we now know these bones likely gathered in rivers over thousands of years.

Frozen mammoth remains are rare but very important. The best-preserved ones come from places in Siberia and Alaska, where the ground stays very cold. These frozen mammoths sometimes still have skin, hair, and even stomach contents. Scientists keep studying these amazing fossils to learn more about woolly mammoths.

Cultural significance

The woolly mammoth has stayed important in culture long after it went extinct. Indigenous peoples in Siberia found mammoth remains and used their tusks for the ivory trade. They had many myths about mammoths — some believed they were giant birds that created mountains and lakes, while others thought they made the world by digging up land from the ocean floor.

In North America, native peoples also used mammoth ivory and bone for tools and art. They had their own stories to explain the remains, sometimes thinking they came from huge ancient beasts or giants. Mammoth tusks were traded in Asia for centuries and were used to make special items, like thrones. Today, mammoth ivory is still valuable and is sometimes used to help protect living elephants from being hunted for their ivory.