Washington Post: SCIENTISTS HAVE a good sense of what the Earth's climate has been like over the past handful of centuries. But what about many thousands of years back?
In a recent article in the journal Science, researchers at Oregon State University and Harvard explained how they used marine fossils to piece together a rough temperature record going back 11,300 years to the most recent ice age. That record indicates that the Earth warmed as it emerged from the ice age, followed by a long-term cooling trend....