How Humans Could Make Icehouse Earth into a Hothouse
Earth's climate has slowly fluctuated between cold and hot periods for millions of years. Today, humans are greatly accelerating that process.
Trees have an environmental record etched into their very wood.
Together, all the cars on Earth would leave quite the pile of carbon behind—every day.
Learn more about a lush forest that once dominated the Arctic.
Scientists dig up ancient clams from the ocean 90 miles from the nearest beach.
Drop yourself into a modern-day swamp, and that's what the ancient Arctic looked like.
Carbon dioxide acts like a heat-trapping blanket, warming our planet.
What if carbon dioxide pollution were solid carbon chunks?
Warming ocean water is eating away at Greenland's glaciers from below.
See how one small town’s survival is threatened by climate change.
Learn more about our planet’s Hothouse and Icehouse climates.
Explore this spectacular, icy cave.
Lake mud from the Russian Arctic tells us that Earth's climate has oscillated in the past.