Meet the World's Cutest Polar Bear: Siku!Hand-raised since infancy, this 3-month-old cub has become an object of adoration – and an ambassador for polar bear conservation

Credit: Courtesy Søren Koch/Hilmer & Koch Nature Photography

Updated: Monday Mar 05, 2012 | 05:45 AM EST

PEEKABOO BEAR

Siku was born last year on Nov. 22, but when staff at the Scandinavian Wildlife Park discovered his mother, Ilka, could not produce milk, they began bottle-feeding him.