Columbia University

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.

dateNov 11, 2013 in Earth Sciences
shares0 comments 4

New techniques produce cleanest graphene yet

Columbia Engineering researchers have experimentally demonstrated for the first time that it is possible to electrically contact an atomically thin two-dimensional (2D) material only along its one-dimensional (1D) edge, rather ...

dateOct 31, 2013 in Nanomaterials
shares0 comments 2