Sales of bison meat like this sirloin steak have risen in recent years, as more consumers look for red meat that is lower in fat and cholesterol than most beef.
Larry Crowe/AP
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This satellite image taken Sept. 27, 2009, shows a suspected nuclear enrichment facility under construction inside a mountain located about 20 miles outside Qom, Iran. The revelation of the previously secret facility has fueled fears that Iran has a clandestine program to develop nuclear weapons.
AP/DigitalGlobe
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A recent survey of microbiologists across the country documented 13 episodes of microbial destruction involving viral, bacterial and fungal strains.
iStockphoto.com
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