Trees are the largest living organisms that live on Earth. The biggest tree is the Californian giant redwood, which grows nearly 100 m high and can have a trunk that is 11 m thick. The total weight of one of these trees is more than 2,000 tonnes, which is more than 10 times heavier than a blue whale.
These ancient giant trees have very few branches and leaves, and are often scarred by fire and lightning strikes.
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