Why a new study suggests you wear a face mask when you speak to anyone.
Gas prices in Texas and elsewhere in the United States have jumped an average 7 cents in recent days after Iran threatened to close the Strait of Hormuz through which 16 million barrels of oil - about a fifth of world's daily oil trade - passes every day.
25-year-old Ethiopian Kenenisa Bekele remains unbeaten in all his eight 10,000m races including the 2004 Athens Olympics.
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