Reconstruction of the environment of a Neanderthal man in the mid-Paleolithic period (80,000 BC) | Xavier ROSSI/Gamma-Rapho via Getty Images

The First Adhesive Was Invented by Neanderthals 200,000 Years Ago

The early hominids were the first to invent an adhesive, and scientists now understand how.

Experimentally produced birch bark tar dripping from a flint flake | Paul Kozowyk
Tar collected in a birch bark container from the "pit roll" experiment, a technique which uses glowing embers placed over a roll of bark in a small pit. | Paul Kozowyk
Approximately 0.3 ounces of birch bark tar produced using the "raised structure" technique being prepared for analysis in the lab | Paul Kozowyk