Capybaras

Capybaras sit inside a hot tub at the Saitama Children's Zoo in Higashimatsuyama, north of Tokyo December 11, 2009. The zoo offers the hot spa to its family of capybara, the largest living rodent in the world, in the winter season to entertain zoo visitors. Credit: REUTERS/Kim Kyung-Hoon

Capybaras

Capybaras sit inside a hot tub at the Saitama Children's Zoo in Higashimatsuyama, north of Tokyo December 11, 2009. Credit: REUTERS/Kim Kyung-Hoon

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A capybara sits inside a hot tub with a cabbage leaf on its head at the Saitama Children's Zoo in Higashimatsuyama, north of Tokyo December 11, 2009. Credit: REUTERS/Kim Kyung-Hoon

Capybaras

Capybaras sit inside a hot tub at the Saitama Children's Zoo in Higashimatsuyama, north of Tokyo December 11, 2009. Credit: REUTERS/Kim Kyung-Hoon

A

A capybara sits inside a hot tub at the Saitama Children's Zoo in Higashimatsuyama, north of Tokyo December 11, 2009. Credit: REUTERS/Kim Kyung-Hoon