Part one: Nature's doppelgängers. Evolutionary déjà vu ; Replicated reptiles ; Evolutionary idiosyncrasy
Part two: Experiments in the wild. The not-so-glacial pace of evolutionary change ; Colorful Trinidad ; Lizard castaways ; From manure to modern science ; Evolution in swimming pools and sandboxes
Part three: Evolution under the microscope. Replaying the tape ; Breakthrough in a bottle ; Jots, tittles, and drunken fruit flies ; The human environment ; Conclusion: Fate, chance, and the inevitability of humans.