Lamont-Doherty Earth Observatory

Andrew Wessbecher (CC'12) and Jiyao Li (GSAS'15), a Columbia graduate student in earth and environment sciences, prepare to deploy seismic tools into the northern Pacific Ocean.

Image credit: Donna Shillington

Early humans were using stone hand axes as far back as 1.8 million years ago. Credit: Pierre-Jean Texier, National Center of Scientific Research, France.

A new study suggests that Homo erectus, a precursor to modern humans, was using advanced tool-making methods in East Africa 1.8 million years ago, at least 300,000 years earlier than previously thought.

After the recent great quakes that have swept away entire coastlines and cities in Japan, Haiti and Sumatra,