U.S. shot putter Adam Nelson has been awarded a gold medal from the 2004 Athens Olympics, after his rival at those games, Yuriy Bilonog of Ukraine, was stripped of the victory last December for violating doping rules. The International Association of Athletics Federations and the International Olympic Committee made the change official Thursday.
NASA's Mars rover Curiosity used its Radiation Assessment Detector (RAD) to measure radiation exposure on the way to Mars. Now, it's recording similar data on Mars' surface. This image is a composite self portrait taken on Feb. 3, 2013.
There was great fanfare when the Mars Science Laboratory launched in November 2011, and again when its precious cargo — NASA's Mars rover Curiosity — touched down on the red planet in August 2012.
The eight months in between had drama of their own. Curiosity was constantly bombarded with radiation as it traveled through space — high-energy protons thrown out by the sun, and galactic cosmic rays slicing through the solar system from distant supernovas.
In the more than eight years since it was written, the open-source operating system Ubuntu's "Bug #1" has been seen as a rallying call. After all, the bug's title is "Microsoft has a majority market share."
But the entry was officially closed Thursday, partly because the "broader market has healthy competition" as Ubuntu leader Mark Shuttleworth writes in his comments on closing the bug today.
Sometimes the most powerful and transformative technologies emerge by accident, an unintended consequence of other developments. When this happens, the scope and power of the new technology can't be fully appreciated until after we have embedded it in our culture.
At a time when many people live longer, it's been a mystery why white women without a high school diploma have been dying increasingly earlier those with more education.
A study in the June issue of the Journal of Health and Social Behavior tries to understand this growing mortality gap, and finds two key factors: smoking — already well known as detrimental to life expectancy — and, more surprising, unemployment.
Patients wait in line at Nuestra Clinica Del Valle in San Juan, Texas, in September 2012 file photo. A study released on Wednesday finds that immigrants, particularly noncitizens, heavily subsidize Medicare, and that policies that restrict immigration may deplete Medicare's financial resources.
A letter mailed to President Obama that is similar in some way to two possibly ricin-laced letters sent to New York City Mayor Michael Bloomberg was intercepted Thursday at a mail-handling facility, the Secret Service and other law enforcement authorities confirm.
Secret Service spokesman Brian Leary says in an email to NPR that: