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The Associated Press
AP Top Science News At 5:07 p.m. EST

Mouse study finds extra oxygen may spur tumor-fighting cells
WASHINGTON (AP) -- A provocative study in mice suggests something as simple as breathing in extra oxygen might give immune cells a boost in attacking cancer....

Fossil jaw sheds light on turning point in human evolution
AP Photo
NEW YORK (AP) -- A fragment of jawbone found in Ethiopia is the oldest known fossil from an evolutionary tree branch that eventually led to modern humans, scientist reported Wednesday....

Second Los Angeles hospital reports 'superbug' infections
LOS ANGELES (AP) -- A second hospital in Los Angeles says several patients have been infected with a "superbug" tied to a medical scope similar to a recent outbreak at the Ronald Reagan UCLA Medical Center....

UK scientists work out weight of Sophie the Stegosaurus
LONDON (AP) -- Scientists at a British museum have worked out the living weight of Sophie, one of the world's most complete Stegosaurus skeletons....

UN: World eating too much sugar; cut to 5-10 percent of diet
LONDON (AP) -- New guidelines from the World Health Organization are enough to kill anyone's sugar high. The U.N. health agency says the world is eating too much sugar and people should slash their intake to just six to 12 teaspoons per day - an amount that could be exceeded with a single can of soda....

NASA investigating short circuit on Mars rover Curiosity
PASADENA, Calif. (AP) -- The Curiosity rover has temporarily stopped work on Mars while NASA engineers investigate a short circuit....

NASA spacecraft making first visit to dwarf planet Ceres
PASADENA, Calif. (AP) -- A NASA spacecraft is about to reach the end of a nearly eight-year journey and make the first rendezvous with a dwarf planet....

DNA tool helping biologists find elusive or invasive species
BELLEVUE, Wash. (AP) -- When salmon, salamanders or other aquatic animals poop or shed skin cells, they leave behind traces of their DNA in the water, like clues left behind at a crime scene....

DNA study backs theory of massive steppe migration to Europe
BERLIN (AP) -- A wave of migrants from the eastern fringes of Europe some 4,500 years ago left their trace in the DNA - and possibly the languages - of modern Europeans, according to a new study....

Egypt unearths 3000-year-old tomb in southern city
CAIRO (AP) -- Egypt's Ministry of Antiquities says American archeologists have discovered a 3000-year-old tomb with beautifully painted walls belonging to a nobleman who guarded the temple of the ancient deity Amun....