A well-preserved fossil introduces a new species that lived in what is now California around 42 million years ago -- Read more on ScientificAmerican.com
A well-preserved fossil introduces a new species that lived in what is now California around 42 million years ago -- Read more on ScientificAmerican.com
Archaeological finds suggest that people developed numbers tens of thousands of years ago. Scholars are now exploring the first detailed hypotheses about this life-changing invention -- Read more on ScientificAmerican.com