Columbia University

The dinosaurs' demise up close

Tourists flock to Italy to see Michelangelo's David and other iconic hunks of Renaissance stone, but in a trip over spring break, a group of Columbia students got to visit rocks that have shaped the world ...

Feb 07, 2014 4.8 / 5 (5) 0

Mining the history of science

History professor Pamela Smith started college thinking she would be a chemist. Then she took a course on the history and philosophy of science and "was just bowled over."

Dec 18, 2013 5 / 5 (1) 0

Climate change and the future of Mono Lake

Guleed Ali pauses to study his notebook, standing on a steep slope covered in gray volcanic ash and desert brush, high above the present-day shore of Mono Lake in eastern California. He looks across the slope ...

Dec 13, 2013 3 / 5 (2) 1

When the Sahara turned to sand

The Sahara wasn't always a desert. Trees and grasslands dominated the landscape from roughly 10,000 years ago to 5,000 years ago. Then, abruptly, the climate changed, and north Africa began to dry out.

Nov 11, 2013 4.4 / 5 (12) 4