Wednesday, August 4, 2010

Too Little Sleep May Raise Heart Disease Risk

 People who sleep for less than seven hours a day, including naps, are at a higher risk of cardiovascular disease. Sleeping fewer than five hours a day, including naps, more than doubles the risk of chest painheart attack, or stroke, according to a study conducted by researchers at West Virginia University's (WVU) faculty of medicine.

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Bow-and-Arrow Technology at Fa-Hien Lena 48000 years ago

 The research conducted at Fa-Hien Lena cave revealed an extensive osseous (bone) toolkit. The archaeologists identified 130 bone projectile...