Cave bears were large mammals that lived in Europe and parts of Asia during the Pleistocene epoch. They are closely related to modern brown bears and are known for their massive size, with some individuals weighing over 1,000 pounds. Cave bears primarily inhabited caves, which provided shelter and protection from predators. These bears primarily fed on vegetation, including leaves, fruits, and roots. Fossil evidence suggests that they went extinct around 25,000 years ago, likely due to a combination of climate change and competition with early humans for resources. Their remains have been found in many archaeological sites, providing insight into their lives.