davidoo750, Flickr
"Knut is sharing his quarters with another polar bear named Giovanna, who is his cousin," states PETA on its Web site, adding that Knut and Giovanna (whose nickname is Gianna) share the same grandfather. To avoid any possibility that the pair will mate and produce inbred offspring, PETA's Germany chapter is demanding that Knut be castrated.
"If Knut and Giovanna were to have any offspring, it could threaten the genetic diversity of Germany's polar bear population, and the new bears could be susceptible to a condition known as 'incest depression,'" says PETA, citing expert Frank Albrecht.
For all his celebrity -- he was photographed for Vanity Fair by Annie Leibovitz, for example -- Knut has had a tough life. First, his mother -- a retired circus animal, according to People -- rejected Knut and his twin brother after giving birth in December 2006. Then Knut's twin brother died of a fungal infection. Knut was left alone to be hand-raised by humans. He managed to form an attachment to his devoted trainer, Thomas Dörflein, only to have Dörflein suddenly die in 2008.












