Stratosphere Giant was once considered the tallest tree in the world. It was discovered in July 2000 in Humboldt Redwoods State Park, measuring 112.34 metres (368.6 ft) tall. The tree has continued to grow and measured 113.11 m (371.1 ft) in 2010. It is a specimen of the species Sequoia sempervirens, the Coast Redwood. It is surrounded by a large number of trees of almost equal size. To avoid damage by tourism, the tree's exact location was not disclosed to the public.
On August 25, 2006, a redwood named Hyperion in the Redwood National Park was discovered by Chris Atkins and Michael Taylor, and is considered the tallest tree (and living thing), measuring 115.55 m (379.1 ft). This has been confirmed using a tape measurement. Two other trees in this forest were found to be taller than Stratosphere Giant as well.
- Martin, Glen (September 6, 2006). "Eureka: New tallest living thing discovered / HYPERION: At 378.1 feet, new champion in Redwood National Park on North Coast towers 8 feet above the Stratosphere Giant". The San Francisco Chronicle.
- Preston, Richard (October 9, 2006). "Tall for its age - Climbing a record breaking redwood" (PDF). The New Yorker. Retrieved March 26, 2010.
- Taylor, Michael (January 10, 2010). "Tallest Redwoods Update". Landmarktrees. Retrieved May 7, 2010.
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