Although scientists have known that a funguslike organism caused the potato blight that triggered the Great Famine in Ireland in the 1840s, they didn't know which strain was the culprit. But they do now, thanks to the genes in some 19th century potato samples.
Lois Lerner, who's at the center of the political firestorm over her agency's singling out of some conservative groups for extra scrutiny, then invoked her Fifth Amendment right not to answer questions from Congress.
Apple CEO Tim Cook faced tough questions on Capitol Hill on Tuesday. He defended a tax strategy that allows Apple to avoid taxes on tens of billions of dollars of profits. Cook also called on the Congress to lower the U.S. corporate tax rate.
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