Here is an amazing example of humans piggybacking on a natural phenomenon to create an incredibly clever system: crab-based computing.
A crab-based computer starts with swarms of crabs. These swarms include hundreds of thousands of crabs that, individually, run every which way but that, as a group, progress in one direction. Even more incredible -- when two swarms collide, they merge and start moving along the vector of their combined velocity (hellloooo, high school physics!).
So what does this have to do with computing? A team of researchers set up a system where crab behavior would provide the basic logic on which computers work. For instance, a computer might need to take inputs X and Y, and output the result “X or Y” -- a 1 if either X or Y is 1, and a 0 otherwise. Crabs can do that: