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What Is Ricin? Ricin is a potent toxin derived from the castor bean plant (Ricinus communis). The castor bean plant is native to tropical climates all over the world, and the beans are used...
The microbial population in the air of the New York City subway system is nearly identical to that of ambient air on the city streets. This research, published ahead of print in the...
An envelope that tested positive for the deadly poison ricin was intercepted Tuesday afternoon at the U.S. Capitol's off-site mail facility in Washington, congressional and law enforcement...