Credit Courtesy of Del Baston, Center for American Archaeology
A dog burial in Greene County, Ill. This fossil dates back to about 8,500 years ago.
Credit Courtesy of Royal Belgian Institute of Natural Sciences
This part of a dog skull found in a cave in Belgium dates back to about 36,000 years ago. Scientists think this species was an ancient sister-group to all modern dogs and wolves, rather than a direct ancestor.
Scientists have used some new tricks and old dogs to show that thousands of years ago, wolves may have first become man's best friend in Europe.
Researchers extracted DNA from ancient wolf or dog fossils and compared it with DNA from modern dog breeds and wolves. Until recently, labs didn't have the kind of genetic tools they'd need to work with such old dog DNA and do this kind of detailed comparison.
This week, we've been reporting onthe sharing economy— a term that describes the couch-surfing, car-sharing and community-garden-growing world where so many people are using their existing talents, space or tools.
In the mountain streams of the American West, the trout rules. People don't just catch this fish; they honor it. And spend lots of money pursuing it.
But some western trout may be in trouble. Rivers and streams are getting warmer and there's often less water in them. Scientists suspect a changing climate is threatening this iconic fish.
I joined two such scientists from the U.S. Geological Survey as they drove up a mountain road in Montana, in the northern Rockies, a place dense with stands of Douglas fir and aspen trees and braided with mountain streams.
The big numbers out today are the administration's counts of how many people actually enrolled in health exchanges between Oct. 1 and Nov. 2. More than 106,000 Americans selected health plans in the first month, the government said.
Originally published on Wed November 13, 2013 2:34 pm
A team appointed by President Obama to review U.S. spying policies in the wake of the Edward Snowden revelations about National Security Agency programs has delivered an interim report to the White House.
National Security Council spokeswoman Caitlin Hayden said in an email to news organizations that the review group "has orally provided their interim report to the White House, with their final report due by Dec. 15." She said the results would be made public "in some way" once the finished review is submitted.