Ancient heat wave?Breaking News
About 55 million years ago, an intense heat wave hit the planet. Earth's surface temperature surged by 9 degrees Fahrenheit (5 degrees Celsius). Then, after a relatively short time, the heat subsided, only to be followed by at least two similar, but smaller heat waves.
Based on chemical clues preserved in rocks, scientists believe a surge of carbon dioxide warmed the planet. But where did all of this greenhouse gas come from?
A team of scientists is proposing that it came from the melting of permafrost, frozen soil packed with organic matter, after cycles in the Earth's orbit warmed up the areas near the poles. The melting released a massive amount of carbon into the atmosphere, keeping reflected sunlight from escaping and causing the heat wave....
comments powered by Disqus
- Rubio Surges Into Second In New Hampshire
- Branstad Says Cruz Ran ‘Unethical’ Campaign
- Christie Highlights Santorum’s Endorsement of Rubio
- Portman Comes Out Against Trade Deal
- Megyn Kelly Gets a Book Deal
- A Big List of the Bad Things Clinton Has Done
- An Unambiguous Sign Sanders Won Last Night’s Debate
- Still Friends at the End
- Quote of the Day
- Trump Still Leads as Clinton Slips
- Clinton Can’t Shake Image as Wall Street’s Friend
- Maddow Doesn’t See Sanders Winning
- Why Does the Media Still Shield Chelsea Clinton?
- Bush Jokes His Mother May Have Abused Him
- Rubio Closes the Gap in New Hampshire
- Parents outraged after students shown ‘white guilt’ cartoon for Black History Month
- Maryland is once again considering retiring its state song
- One of the last remaining Nazis goes on trial in Germany
- Inside story finally told of the young US diplomat who cracked the case of the murder of 4 nuns in El Salvador in 1980
- Newly released interactive map shows images of destroyed monuments of Mosul
- A historian’s advice to students thinking of getting a PhD in a tough economic climate
- German historian Heinz Richter cleared of charges
- English professor uses literature to help cure historical amnesia
- WSJ features an article by a conservative calling for the abolition of Black History Month
- Mary Beard, herself a bestselling author, wonders why more women historians aren't