Why There Are No Neanderthals or Any Other Species

The Earth was not always inhabited by a single human species. For hundreds of thousands of years, our ancestors shared the planet with several close relatives, each possessing unique physical characteristics, behaviors, and survival strategies. Among these were the Neanderthals, Denisovans, Homo erectus, Homo floresiensis, Homo naledi, and other ancient members of the human family. Today, however,...