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.
In The Wild Trees, Day of Discovery, Preston quoted Van Pelt that there remained nothing to be found comparable to the trees in the Grove of Titans. But 2014 proved otherwise, more than once.
http://www.mdvaden.com/redwood_year_discovery.shtml