Leprino's is the largest mozzarella manufacturer in the world. Now that the company is expanding, Colorado dairy farmers are beefing up their operations. The changes don't come without costs.
Scientists have been able to keep human embryos alive twice as long as before. The technique is reopening a debate over a rule limiting research on human embryos to 14 days.
Put on your waders and foam-soled boots — we're about to adventure into a shallow creek in Great Smoky Mountains National Park which straddles the border of North Carolina and Tennessee.