2. Mammoths: Mammoths were large, elephant-like animals that lived in North America, Europe, and Asia during the Pleistocene epoch. They were covered in thick fur and had long, curved tusks. Mammoths became extinct about 10,000 years ago, possibly due to a combination of factors including climate change and hunting by humans.
3. Smilodon (Saber-toothed cat): Smilodon was a genus of prehistoric saber-toothed cats that lived in the Americas during the Pleistocene epoch. They were characterized by their long, saber-like upper canine teeth, which could grow up to 12 inches long. Smilodon became extinct about 10,000 years ago, possibly due to a combination of factors including climate change and competition with other predators.
4. Dodo: The dodo was a flightless bird that was endemic to the island of Mauritius in the Indian Ocean. It was about 1 meter (3 feet) tall and weighed up to 10 kilograms (22 pounds). Dodos had long, thick beaks and small wings. They became extinct in the 17th century, primarily due to hunting by humans and introduced predators.
5. Great Auk: The great auk was a flightless bird that lived in the North Atlantic Ocean. It was about 80 centimeters (32 inches) tall and weighed up to 5 kilograms (11 pounds). Great auks had long, pointed beaks and black-and-white plumage. They became extinct in the mid-19th century, primarily due to hunting by humans for their meat, feathers, and eggs.
These are just a few examples of extinct organisms. There are many other species that have become extinct over the course of Earth's history, due to a variety of factors including climate change, natural disasters, and human activity.