The specific epithet of the species' botanical name -- Sequoia sempervirens
-- provides a clue here. "Sempervirens" is Latin for "always flourishing" and is a direct allusion to the tree's resilience in springing back from major damage. Redwoods would never grow to be thousands of years old if they didn't have that feature: fire is a natural part of West Coast ecology. Along the redwood corridor, curiosity shops often sell cut-off burls of redwood, which will resprout if you keep them in a dish of water. It's desire to come back to life is just irrepressible. If you live in redwood country, you'll learn that resprouting stumps can be a problem...they're almost impossible to kill. I had to have a redwood with a 40" caliper removed when I bought my house because it was starting to lean precariously toward the living room (the insurer insisted). This is what the stump looks like now a few years later (I had stripped all the sprouts off last spring).