the Singapore Zoo. Knut, a male polar bear born in captivity at the Berlin Zoological Garden, was rejected by his mother at birth and raised by zookeepers. He was the first polar bear cub to survive past infancy at the Berlin Zoo in more than 30 years. At one time the subject of international controversy, he became a tourist attraction and commercial success. Knut became the center of a mass media phenomenon dubbed "Knutmania" that spanned the globe and spawned toys, media specials, DVDs, and books. Because of this, the cub was largely responsible for a significant increase in revenue, estimated at about five million euros, at the Berlin Zoo in 2007. On 19 March 2011, Knut unexpectedly died at the age of four. His death was caused by drowning after he collapsed into his enclosure's pool while suffering from encephalitis. Monarch, a male California grizzly bear, was one of the last wild grizzly bears in California, United States. Monarch was captured in 1889 upon orders of newspaper editor William Randolph Hearst and was put on public display by Hearst at Woodward's Gardens in San Francisco. At the time he was thought to be the largest bear in captivity, and over 20,000 people came to see him on the first day of the exhibit. After his death, his stuffed body was used as the model for the bear on the California state flag. Nora, a female polar bear at the Oregon Zoo. Old Martin was a large grizzly bear given to George III in 1811 by the Hudson's Bay Company. The bear was sent to join the Royal Menagerie, housed at the Tower of London. Although this was the first grizzly bear in England, the king said he would rather have had been given a new tie or a pair of socks. Pipaluk, a male polar bear, was the first male polar bear born in captivity in Britain, and, like Brumas, became a major celebrity at Regent's Park Zoo in London during early 1968. His name came from an Inuit term meaning "little one". Pipaluk was moved from London to Poland in 1985 when the Mappin Terraces, which housed the bears, was closed. He died in 1990. Siku, a male polar bear, was born in November 2011. Abandoned by his mother, who produced insufficient milk to feed him, he was put into care at Skandinavisk Dyrepark (the Scandinavian Wildlife Park,