Health
US Flu Outbreak Earlier, Spreading Faster
The United States is in the grip of a widespread flu outbreak, with crises in Chicago and Boston. An estimated 36,000 people die of flu in the United States each year and it kills some 500,000 people annually around the world. Doctors say it is an unusually early and busy flu season in the U.S.
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Brown Eyes Beat Blue Ones for 'Trustworthiness': Study
People with brown eyes are generally considered more trustworthy than those with blue eyes, a new study suggests.
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Heart Muscle Cells Regenerate in Kids, Research Shows
Human hearts continue to generate new cells after birth, a finding that could lead to new ways to treat heart problems, researchers say.
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Safe Ways to Relieve Your Young Child's Flu Symptoms
Flu season is especially bad in the United States this year, and young children with the flu tend to suffer more than others because they can't take over-the-counter medications to help relieve their symptoms.
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New UN environment studies show rising mercury threat to people in developing countries
The use of mercury to extract gold poses health risks to artisanal miners.
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How Much Caffeine in That Supplement? Hard to Tell
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Lifetime of Speaking a 2nd Language May Boost Aging Brain
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Do Babies Begin Learning Language in the Womb?
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NIH study uncovers details of early stages in muscle formation and regeneration
To form muscle fibers, masses of cells merge to form long tubes with many cell nuclei (above). Recent research reveals two distinct stages in this process. First, proteins on the outside of the cells (shown as spikes in A) promote the fusion of the cell membranes. The blue squares in B and C represent proteins inside the cells that facilitate the development of a pore between them, so their contents can merge. This process of cell fusion is a basic part of the biology of muscle cell fusion and of several other types of cells as well.
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Low Vitamin D in Early Pregnancy Tied to Lower Birth Weight
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