Park Williams, a scientist at Columbia University's Lamont-Doherty Earth Observatory, explains how climate change is influencing the number and frequency of wildfires.

Marie Tharp, who worked at Columbia's Lamont-Doherty Earth Observatory, used hundreds of seismic profiles to reconstruct the topography of the seafloor

The 100th meridian has long divided the U.S. into an arid West and more humid East. Richard Seager, a Columbia climate scientist, explains how our warming climate is pushing that boundary east, shaking up agricultural economies along the way.

Because cyclists are, on average, inhaling more air — they’re also breathing in more air pollution. A Columbia University research project is trying to figure out just how much more.

“Climate is really running the show in terms of what burns. We should be getting ready for bigger fire years than those familiar to previous generations,” said Park Williams, an expert on wildfires and drought at Lamont-Doherty Earth Observatory.

A report written by David Sandalow, a former United States energy official now at Columbia, found China still needs to take significant steps to curb its own carbon dioxide emissions.

Four virtual-reality films that take you on, above and below the Antarctic ice, some of which feature research by polar scientists at Columbia University's Lamont-Doherty Earth Observatory.