In the middle of the little town of Lahaina on the island of Maui, there is an ancient banyan tree that is massively huge. It has spreading, winding branches that fill the little park where it’s located. It’s quite impressive and was the largest tree we had ever seen.

But it could have been gobbled up whole by the huge redwood we were gazing at in the middle of Muir Woods. Soaring high above our …