DICCON ALEXANDER / SCIENCE PHOTO LIBRARY DICCON ALEXANDER / SCIENCE PHOTO LIBRARY
Giant sequoia (Sequoiadendron giganteum). This is the 'General Grant' giant sequoia tree, which has the largest diameter of all giant sequoia trees, measuring 8.85 metres at breast height. Giant sequoias grow at altitudes of 1400-2400 metres, and are native to the Sierra Nevada mountains of California, USA. Thought to live for up to 4000 years, the biggest trees weigh over 1000 tonnes. Specimens of S. giganteum have been introduced to the UK, where they are known as 'Wellingtonia'. Photographed in Kings Canyon National Park, California.
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