Obsidian Cliff: Humanity’s Tool Shed for the Last 11,500 Years by Jim Robbins


X-ray technology has allowed researchers a glimpse at the reaches of the Yellowstone landmark’s prized stone and its importance to Indigenous people.

Published: March 20, 2023 at 01:00AM

from #NYT Science Read the full article here: https://ift.tt/U0SVtrG