Life depended on a rare metal for survival – billions of years ago
Earth’s earliest microbes may have built vital chemistry around molybdenum, a metal thought too scarce to matter in…
1.9 million-year-old finding points to the earliest evidence of humans outside of Africa
When a stone sits on the Earth’s surface, cosmic rays quietly pepper it, leaving behind rare isotopes like…
Mayan astronomers built a 700-year-long eclipse calendar centuries before telescopes
More than a thousand years ago, astronomers from the Maya civilization developed one of the most sophisticated time-keeping…