Evolution may explain 'Runner's high,' study says

(HealthDay) -- The pleasurable feeling known as "runner's high" that's triggered by aerobic exercise may have played a role in the evolution of humans' ability to run long distances, a new study suggests.

Opportunity rover rolling again after fifth Mars winter

(Phys.org) -- With its daily supply of solar energy increasing, NASA's durable Mars Exploration Rover Opportunity has driven off the sunward-tilted outcrop, called Greeley Haven, where it worked during its fifth Martian winter.

China's Huawei hopes to make a name for itself

(AP) -- Will Americans buy a Chinese smartphone? We're about to find out, as Huawei, one of the world's biggest phone makers, is planning a big push into U.S. cellphone stores.

US military to pack more BlackBerry smartphones

Research In Motion (RIM) on Wednesday announced that the US Department of Defense staff and partners have been given the go-ahead to use more of the Canadian firm's BlackBerry OS 7 smartphones.

Peru says 5,000 birds, nearly 900 dolphins dead

The Peruvian government said Wednesday that 5,000 birds, mostly pelicans, and nearly 900 dolphins have died off the country's northern coast, possibly due to rising temperatures in Pacific waters.

Google wants Oracle copyright trial rematch

Google on Wednesday confirmed that it wants a new trial on the copyright portion of a legal battle being fought with Oracle in San Francisco federal court.

US online spending climbs

US online spending in the first three months of this year surged with a little help from shoppers using tablet computers to buy clothing and other items, comScore reported on Wednesday.

ABC tries social network experiment with 'Revenge'

(AP) -- ABC and Yahoo will experiment on the season's last two episodes of "Revenge" with a smartphone and tablet application designed to encourage more people to watch television live.

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