An arborist told us something about the tree that we had not known. Early in its life, the tree had been almost been killed by a direct lightning strike. Separate sections of the split trunk began competing to become the dominant trunk of the tree. Usually, one branch will overshadow, literally, the other branches and become the main trunk. In this case, the open field allowed each of the branches to have all of the sunlight and nutrients it needed so that they all became trunks. Thus, over the decades, each of the splinter trunks have become sizable trees in their own right and, together, they have formed this magnificent tree.
Somehow, that story makes our Tree of Life name that much more meaningful.