For anyone who wants a concrete experiment to challenge your ideas of just how complex nature is, try making a cell. Just one cell. From scratch with nothing but ions and proteins. If you find that to be achievable (there's likely a Nobel prize in it for you), try making one that divides. Now imagine that somehow an elephant can be encoded in the ions/proteins of just two cells. Humanity has never built anything that even comes close to such complexity. And then to imagine that ecosystems operate on the complex interactions between these immensely complex organisms.