I'm writing an S.F. novel, "The Sage of Saggitarius" ,that features an enhanced woman, Zila, searching for the "secret of life" with the aid and funding of a very unhuman sentient over a thousand years old.
I've done years or research on evolution. The modern basis is molecular biology, not fossils, and the key constructs are the conserved genes that are 100 million years old. Evolution turns out not to be "survival of the fittest" because no one can define fitness with all the implication of the relationships among the environment, competitors, predators and their feedback loops. These are impenetrable webs of non-linear equations. Fitness landscapes probably exist, but most of the hill climbing leads to dead ends. And what happens when a particular species, such as humans, is no longer dependent on a particular fitness niche?
The work of Jeffrey England may be the great breakthrough. He sees evolution as part and parcel of of entropy. It cannot be observed by examining instances. It's an emergent phenomenon, like entropy itself. Life serves the Tree of Life. Evolution serves entropy.
These are not easy things to explain, and perhaps harder to understand.