Long-lost fragment of Stonehenge reveals rock grains dating to nearly 2 billion years ago

Accelerator mass spectrometry — an advanced form of radiocarbon dating — reveals that Machu Picchu was in use from about A.D. 1420 to A.D. 1530 making the site at least 20 years older than the accepted historical record suggests.

Happy birthday, Fermi! Top 5 highlights from 13 years of the gamma-ray telescope

After 60 years, scientists find the missing link in our body’s blood pressure control