Over six years ago I wrote this book review of The Wild Trees by Richard Preston. It is a wonderful story about tall trees and the nature lovers who study them. The foremost expert is Steve Sillett. Just recently I saw this video link by a friend on Facebook about Sillett measuring the tallest tree in the world, named Hyperion. It gives some perspective. In The Wild Trees, I learned about the art of tall tree climbing that Sillett and his friends and coworkers essentially invented as they went.