Sequoia trees, known scientifically as Sequoiadendron giganteum, are among the largest and oldest trees on Earth. They can grow over 300 feet tall and live for more than 3,000 years. These majestic trees are native to the western slopes of the Sierra Nevada mountains in California. Sequoias have thick, reddish-brown bark that helps protect them from fire and pests. Their cones are small and can take up to two years to mature. These trees play a crucial role in their ecosystem, providing habitat for various wildlife and contributing to the overall health of the forest.