Stone-age 'likes': Study establishes eggshell beads exchanged over 30,000 years

Stone-age 'likes': Study establishes eggshell beads exchanged over 30,000 years
https://phys.org/news/2020-03-stone-age-eggshell-beads-exchanged-years.html
https://phys.org/news/2020-03-stone-age-eggshell-beads-exchanged-years.amp