Berlin hasn't seen this level of frenzied excitement since David Hasselhoff picked up a microphone. But Knut, the first polar bear born at Berlin's Zoologischer Garten in 33 years, has become a worldwide phenomenon since making his March 23 debut. Some 250,000 fans have visited him since then, with thousands of others snapping up Knut-themed merchandise like T-shirts, candy, DVDs and, in the works, cough drops. To cement his A-list status, Knut—who has a blog and a weekend German TV show—even landed the May cover of Vanity Fair alongside Leonardo DiCaprio (sorry, Leo: the cub appears solo in the German edition). "Who would have expected this?" says Thomas Dörflein, Knut's zookeeper. "No one thought he would be this popular."

Least of all Knut's mother, a retired circus animal who rejected Knut and his twin brother (who subsequently died of a fungal infection) after giving birth Dec. 5. As Knut faced almost certain death without his mom's milk, Dörflein moved in with the cub to administer bottle feedings. While some animal rights activists protested Knut's forced dependence on humans, the rest of the world rallied around him. Why is everyone nuts for Knut? Peter Walschburger, a biopsychology professor at Berlin's Free University, told reporters that Knut's "childlike characteristics" instinctively drive fans to nurture him. None more than Dörflein, who says he isn't bothered by the frenzy, though it leaves him with "zero private life at the moment." Knut, no doubt, can sympathize.

  • Contributors:
  • Reported by Karen Nickel Anhalt/Berlin.
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