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.
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.
This map from the NOAA Environmental Visualization Laboratory shows the amount of heat energy available to Typhoon Haiyan between Oct. 28 and Nov. 3. Darker purple indicates more available energy. Typhoons gain their strength by drawing heat out of the ocean. The path of the storm is marked with the black line in the center of the image.
Credit NOAA Office of Coast Survey
Typhoon Haiyan struck the Leyte Gulf, in the Philippines, nearly dead-on, creating a 13-foot storm surge that funneled water into Tacloban city.
An artist's rendition of the GOCE satellite shows the craft in its orbit around Earth. After four years of studying oceans and gravity fields, GOCE re-entered the atmosphere over the Southern Atlantic Ocean Sunday night.
Originally published on Mon November 11, 2013 2:41 pm
More than a ton of advanced electronics, including an ion engine and sensors that help detect variations in gravity, crashed into Earth's atmosphere Sunday night, when the European GOCE satellite ended its four-year mission. Most of the 2,425-pound craft disintegrated when it re-entered the atmosphere over the South Atlantic Ocean; about 25 percent did not.
Ronald Heifetz has been a professor of public leadership at Harvard's Kennedy School for three decades, teaching classes that have included aspiring business leaders and budding heads of state. Each year, he says, the students start his course thinking they'll learn the answer to one question:
As leaders, how can they get others to follow them?
With a Swiss forensics investigation pointing to polonium-210 as a possible cause of Yasser Arafat's death, the radioactive element is back in the news.
Confirming whether the Palestinian leader died from an assassination attempt will be difficult, given polonium's short half-life and the fact that Arafat has been dead nine years, science writer Deborah Blum says.
Whatever happened to Arafat, polonium does have a deadly history.