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Record response to call for new astronauts

PHILADELPHIA, Jan. 9 (UPI) -- U.S. researchers say they've identified the origin of bone marrow stem cells in a mouse embryo.
Nancy Speck of the University of Pennsylvania School of Medicine said the findings, published online in the journal Nature, may help researchers in their effort to manipulate embryonic stem cells to generate new blood cells for therapy.
Hematopoietic -- or blood -- stem cells found in the bone marrow of adult mammals generate all of the blood cell types of the body.
"The ultimate goal for stem cell therapies is to take embryonic stem cells and push them down a particular lineage to replace diseased or dead cells in human adults or children," Speck, lead author of the paper, said Friday in a release.
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WASHINGTON, Feb. 10 (UPI) --
Iran Supreme Leader Ayatollah Ali Khamenei issued a stern warning last week against the international community, which imposed sanctions last month targeting the regime's vital oil exports and central bank.
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MESA, Calif., Feb. 10 (UPI) --
Jesse Farrelly, the 20-year-old son of filmmaker Bobby Farrelly, has died in Costa Mesa, Calif., after a long battle with drug addiction, his family said.
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ST. PETERSBURG, Russia, Feb. 10 (UPI) --
A water sample from Lake Vostok, hidden under Antarctic ice for millions of years, has been presented to Russia's Prime Minister Vladimir Putin, scientists say.
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OTTAWA, Feb. 10 (UPI) --
A village in Canada with a population of 34 is disputing its disappearance as reported in Statistics Canada's census figures released this week.
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