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Its why they have such thick bark ...
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I recall hearing several times the naturalist story that there were massive fires up and down the West Coast 400 years ago which burn through much of the forests.
Note - that so many Redwood Trees in those forests are over 400 years old ...
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IIRC their bark is a natural fire retardant so that would explain how they have survived forest fires over the ages.
Near the southern Oregon Coast, “The Trees of Mystery” is a fantstic place to see the a whole bunch of amazing redwoods, many of them quite ancient.
Truly makes one marvel at the tenacious nature of, well, NATURE!