New evidence of the Sahara's age

The Sahara Desert is vast, generously dusty, and surprisingly shy about its age. New research looking into what appears to be dust that the Sahara blew over to the Canary Islands is providing the first direct evidence from ...

Ancient soil provides a window to the past

Noelle Purcell, a senior in the Columbian College of Arts and Science, spent the first half of her summer in northern Kenya trying to better understand the environmental context of human evolution by studying the morphology ...