In this May 1966 file photo, U.S. Air Force planes spray the defoliant chemical Agent Orange over dense vegetation in South Vietnam. The Department of Veterans Affairs recently announced new guidelines that would cover exposed veterans for additional diseases, including Parkinson's, ischemic heart disease and a form of leukemia.
Archaeologists have unearthed a wealth of new information about dinosaurs in the past decade thanks in large part to new technology. But the T. Rex's telegenic charisma and popular appeal are something that even scientists aren't immune from.
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