Our luck didn’t stop with the physical properties of the universe. S. tchadensis, O. tugenensis, A. ramidus, A. anamensis, A. afarensis, K. platyops, A. africanus, A. garhi, A. sediba, A. aethiopicus, A. robustus, P. boisei, H. habilis, H. erectus, and H. georgicus—among other hominid species—all went extinct. Even the Neanderthals went extinct. We alone made it.
