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The Associated Press
AP Top Science News At 5:21 p.m. EDT

Engineers create boot-like device to make walking easier
AP Photo
WASHINGTON (AP) -- Engineers have come up with a motor-free device to make walking more efficient and easier - something scientists once thought couldn't be done....

Tiny songbird tracked across 1,700 miles of open ocean
AP Photo
MONTPELIER, Vt. (AP) -- A tiny songbird that summers in the forests of northern North America has been tracked on a 1,700-mile, over-the-ocean journey from the northeastern United States and eastern Canada to the Caribbean as part of their winter migration to South America, according to a new study....

Total lunar eclipse offers weekend treat for West Coast
CAPE CANAVERAL, Fla. (AP) -- The heavens are providing a holiday treat this weekend, but you'll have to be quick to catch it....





Scientists say polar bears won't thrive on land food
ANCHORAGE, Alaska (AP) -- A group of researchers say polar bears forced off melting sea ice will not find enough food to replace their current diet of fat-laden marine mammals such as seals, a conclusion that contradicts studies indicating that bears may be benefiting from bird eggs, berries and other land food sources....

Twin fools NASA at brother's launch on 1-year flight
CAPE CANAVERAL, Fla. (AP) -- Astronaut Scott Kelly's identical twin pulled a fast one on NASA right before his brother blasted off on a one-year space station mission....

Study finds equality between sexes at moment of conception
NEW YORK (AP) -- Every year, slightly more boy babies than girl babies are born worldwide. But back when sperm meets egg, the two sexes are conceived in equal numbers, a new study suggests....

US climate treaty pledge relies on uncertain Obama actions
WASHINGTON (AP) -- The United States put forth its contribution Tuesday to a global climate treaty, relying entirely on a set of emission cuts ordered by President Barack Obama that may not survive beyond the end of his presidency....

Solar-powered plane lands in China on round-the-world flight
BEIJING (AP) -- A groundbreaking solar-powered plane successfully flew from Myanmar to central China early Tuesday as part of an historic round-the-world journey promoting renewable energy use....

Ferry operator Stena Line tests running ship on methanol
HELSINKI (AP) -- Swedish ferry operator Stena Line says it has converted one of its ships to enable it to run on methanol, testing the potential of the environmentally friendly fuel for the shipping industry....

Trinity Test site opening to face protest from residents
ALBUQUERQUE, N.M. (AP) -- Seven decades after an atomic bomb helped end World War II, descendants of families near a New Mexico test want tourists to know residents suffered for years afterward and some of their children may have been affected....