New research suggests firelight and spoken language evolved together in human history
Scientists propose a new theory linking the development of fire control with the origins of human speech.
Gestures preceded spoken words
Researchers believe early humans first communicated using gestures similar to those seen in chimpanzees and gorillas today. This form of communication relies on iconic signs that are easy for others to understand without prior knowledge. Such a system would have been essential when groups met without sharing a common vocabulary.
Fire changed communication needs
A new paper argues that the ability to control fire created conditions where spoken language became necessary. Firelight allowed ancestors to gather in dark environments, making visual gestures less effective for distant listeners. Consequently, vocal communication likely developed alongside the mastery of fire to coordinate activities around the flame.
Soft tissue limits fossil record
Direct evidence of ancient vocal tracts and brains is missing because these parts are made of soft tissue that does not fossilize. Scientists must therefore rely on indirect evidence to understand how human communication evolved over time. The lack of physical remains makes determining the exact timeline of language origins a difficult scientific challenge.
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