outskirts of Hyderabad, India, Thursday, April 26, 2012. (AP Photo/Mahesh Kumar A.)

Photo: Mahesh Kumar A., Associated Press

An Indian shepherd woman carries a lamb as she walks across a dried... Photo-2869426.42205 - SFGate

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Models pose during the Dutch final of the annual Triumph Inspiration Award, in Amsterdam, on April 26, 2012. Students from all over the world are challenged to use their talent, artistic vision and inspiration to conceptualize and design a unique lingerie showpiece with this year's theme 'Dragons and Butterflies'. afp photo/ ANP KIPPA ROBERT VOS netherlands out ROBERT VOS/AFP/GettyImages less

Models pose during the Dutch final of the annual Triumph Inspiration Award, in Amsterdam, on April 26, 2012. Students from all over the world are challenged to use their talent, artistic vision and inspiration ...Associated Press

A pair of zebras brush against each other at a zoo in Pyongyang,... Photo-2869429.42205 - SFGate

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Sandra Noriega, of Castro Valley, covers her dog Angie's ears during a percussion lesson on cymbals on Thursday. About 100 musicians got the opportunity to be mentored by San Francisco Symphony members during a training session for woodwind and brass instruments on Thursday, April 26, 2012. The mentoring session at Davies Symphony Hall in San Francisco, Calif., is one of two that were offered by the SFS and which sold out in minutes. less

Sandra Noriega, of Castro Valley, covers her dog Angie's ears during a percussion lesson on cymbals on Thursday. About 100 musicians got the opportunity to be mentored by San Francisco Symphony members during a ... more