Columbia University

The Isthmus of Panama: Out of the Deep Earth

As dates in geologic history go, the formation of the slender land bridge that joins South America and North America is a red-letter one. More than once over the past 100 million years, the two great landmasses ...

Apr 01, 2014
4.6 / 5 (5) 0

An overview of President Obama's climate proposal

The evidence of climate change is all around us – in the melting icecaps, rising global temperature, and the warming oceans. The International Energy Agency cautions that we need to reduce our consumption ...

Jun 26, 2014
3.3 / 5 (7) 0