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Gary Marcus suffers from what a friend jokingly describes as congenital arrhythmia--the inability, despite many hours of his youth spent practicing and taking lessons, to learn to play a musical instrument. A few years ago Marcus, a cognitive psychologist at New York University, decided at 38 to make one last try when he took up guitar. No surprise: He did not succeed in becoming the next Jimi Hendrix, but managed to acquire a modicum of skill--and went on to describe his experience in Guitar Zero: The New Musician and the Science of Learning

By Tom Doggett and Ayesha Rascoe WASHINGTON (Reuters) - The failure of the underwater blowout preventer that led to the massive BP oil spill in the Gulf of Mexico was caused by the inability of attached cutting devices to shear and seal the pipe of the leaking well, the U.S. government said on Wednesday.