Amino acids have been discovered in 48-million-year-old fossil teeth, revealing new insights into ancient life and evolution ...

My colleague and I have published a new study of cactus flowers which may help explain the conundrum. For more than a century ...

The history of Earth is written on the great tablets of tectonic plates. The motions of plates shaped land masses, formed ...

New research led by a University of Wyoming archaeologist is challenging a widely accepted idea about the earliest people in the Americas. The study focuses on an ancient site in South America and ...

Scientists have uncovered the oldest direct evidence yet that Earth’s tectonic plates were on the move 3.5 billion years ago. By analyzing magnetic fingerprints in ancient rocks, they reconstructed ...

A new study questions the age of Chile's Monte Verde archaeological site, reigniting debate over when the first people reached South America.