Ric,
Yesterday, I was glancing at a 2010 video that you had posted in regards to your favorite crab that you had named, As I was watching you struggle to pull this thing out it made me do some thinking as to the possibilty of the castaways using these cut outs in the trees for shelter. As I was glancing at this, the inner shell of the tree looks big enough for anyone to crawl up into and seek shelter from the sun or rain. So with that, my question is did the teams on expeditions of the past check these unique features in the trees and did they find anything. Also, with the expeditions of the past and noticing the trees around the seventh site...have any of these trees changed in anyway that you can tell. Say for example....by age and weathering. What I'm really trying to find out here...is the strength and durability of these trees and can they last for say 75 years?