Science and technology

Associated Press
FILE - In this Wed., Aug. 29, 2012 file photo, Katie Hill, a program associate with the Walker Art Center, shows a frame from a cat video of a cat playing the piano, in Minneapolis. The Walker presented its  first "Internet Cat Video Film Festival" to showcase the best in filmed feline hijinks that drew a crowd of more than 10,000 people. 80 videos culled from 10,000 submissions that covered the simple, funny moment to polished animations and kitty works made by trained filmmakers were shown to the public for free. (AP Photo/Jim Mone, File)

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