Researchers from Eberhard Karls University experimented with five possible ways to duplicate the Neanderthal birch tar
Neanderthal
For 99% of the last million years of our existence, people rarely came across other humans
The gene variants are carried by 20% of present-day Europeans
It is believed to have been made by Neanderthal humans
It was found in Barcelona
Researchers realized the bones were so porous because they'd passed through the digestive system of an enormous bird
Prehistoric humans developed surprisingly sophisticated social and mating networks and deliberately sought partners beyond their families
The bones are the oldest human remains ever discovered in Poland by about 50,000 years
Findings suggest modern human population assimilation with Neanderthal populations was irregular
The new study raises a host of tantalizing implications about human history