Shutting off a large portion of the economy serves as a natural control experiment by creating a world that has very few emissions, says Dan Westervelt, a climate and air-pollution researcher at Columbia’s Lamont–Doherty Earth Observatory.
Kevin Uno, a Columbia paleoclimatologist, studies how abrupt changes in climate affected Neolithic human settlement, diet, and abandonment in northwest Africa.
A Columbia study in mice shows how special cells in the nose help the brain to distinguish between the world’s near-infinite combinations of scents.