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Trees are unbelievably cool. My favorite fact is that the actual living surface of a tree's roots, called the rhizosphere, consists of extremely small, ephemeral hairlike structures that supply the whole, gigantic tree. The large roots we think of are mainly structural. Where the actual "rubber meets the road" of the life form is incredibly small. Within that rhizosphere the interplay of plant, fungi, bacteria, and soil is so intricate that it's difficult to even say where the soil ends and the tree begins.

So many amazing things happen in this space. For example, the tree exudes sugars out of the roots because it creates an electrical gradient that pushes nutrients into the root cells. This way the trees, which are masters of energy efficiency, can use passive transport to uptake nutrients. Fungi have adapted to this energy and symbiotically extend the rhizosphere beyond what the tree is capable of alone. In fact an entire world of organisms has evolved inside the rhizosphere. Similar worlds exist in the bark, the cambium, the buds, the leaves, the flower, and the fruit.

It's like this enormous organism is a fractal masterpiece, and the closer you look the more clever it is. And we all depend on it, because plants are the only organisms capable of turning sunlight into usable energy. Apart from some things living off deep-sea vents, that's it. Even the energy you're using to read this right now passed through a chloroplast. It's just so cool.