A 100,000 Year Old 'High-tech' Glue
The glue may have even marked a turning point in the development of human culture.
A recent study1 found that 100,000 years ago, early humans were employing high-tech "glue" manufactured from a local conifer in Africa. Specifically, early Homo sapiens used glue derived from indigenous Podocarpus trees in the Middle Stone Age to join stone implements to wooden spears.
Several Middle Stone Age sites in South Africa exhibit adhesives, mai…
