It was one of the Earth's momentous times. Continents collided. Volcanoes erupted. Ocean currents shifted. Species ran amok.
Temperatures directly correlate to CO2 levels In Antarctica, but not in the tropics or Northern Hemisphere. Here's why:
Alaska's sprung a freshwater leak, and California is mighty thirsty.
Is Earth's climate vulnerable to small disturbances? Two geologists described the past vulnerability of an ocean current called the North Atlantic conveyor.
An ocean is the last place you'd expect to find a freshwater lake...