Daniel Everett, who has studied unusual languages, says the evidence is in Homo erectus’s tools and artifacts.
Source: Cognitive Scientist: Earliest Humans, Homo Erectus, Had Language | Mind Matters
Daniel Everett, who has studied unusual languages, says the evidence is in Homo erectus’s tools and artifacts.
Source: Cognitive Scientist: Earliest Humans, Homo Erectus, Had Language | Mind Matters
Darwiniana 