The whirl of sound waves allowed the teams to catch, move and orient microscopic particles, all without actually contacting them physically, which makes the solution ideal for handling delicate material.

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"If a Pope clearly realizes that he is no longer physically, psychologically, and spiritually capable of handling the duties of his office, then he has a right and, under some circumstances, also an obligation to resign, " the pope said.

WSJ: Pope Benedict XVI to Resign