There are giants in California. They jut out of soil dampened by fog rolling in from the Pacific and reach greater heights than any other living thing on the planet. They are the coast redwoods: the world’s tallest trees. Many of them grow to be over 200 feet tall and the tallest soar to over 350 feet -- higher than a 30 story skyscraper. When you’re in the middle of redwoods and look up, you won’t be likely to see the tops of the trees and it’s fascinating to realize there’s a hidden world in the canopy above.