Scientists Found a 12,000-Year-Old Monument—Turns Out It May Be Humanity’s Oldest Calendar
created: April 5, 2025, 12:24 p.m. | updated: April 11, 2025, 2:02 p.m.
<p>But just how, exactly, did it track time?</p>
8 months, 2 weeks ago: Latest Content - Popular Mechanics