WILD NATURE

Research chimps enjoy retirement -- at last

For the first time in their lives, four aging chimpanzees once used in federal research can go outside whenever they like. They can lie on the grass, clamber onto a platform 20 feet up on a chimp-style jungle gym and gaze freely at the open sky, the vista unbroken by steel bars. Read more

Two chimps walk together at Chimp Haven

Feb. 19, 2013: Two chimps walk together at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

A baby chimp's hands touch those of other chimps at Chimp Haven

Feb. 19, 2013: A baby chimp's hands, left, are seen touching the hands of other chimps at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

chimp climbs a pine tree at Chimp Haven

Feb. 18, 2013: A chimp climbs a pine tree at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

A mother chimp holds a piece of lettuce in her mouth

Feb. 19, 2013: A mother chimp holds a piece of lettuce in her mouth as she carries her baby at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

The hands of a baby chimp cling to its mother at Chimp Haven

Feb. 18, 2013: The hands of a baby chimp cling to its mother as she walks at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

A mother chimp carries her baby

Feb. 19, 2013: A mother chimp carries her baby at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

A mother chimp relaxes with her baby at Chimp Haven

Feb. 19, 2013: A mother chimp relaxes with her baby at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

Adult chimp plays with a young chimp at Chimp Haven

Feb. 18, 2013: An adult chimp plays with a young chimp at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

Animal care specialist feeds HIV-infected chimps at Chimp Haven

Feb. 19, 2013: Adrienne Mrsny, an animal care specialist, feeds chimps in a section reserved for HIV-infected chimps at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

Two chimps tussle for food at Chimp Haven

Feb. 19, 2013: Two chimps tussle for food at Chimp Haven in Keithville, La..
AP Photo/Gerald Herbert

A baby chimp shows a variety of expressions

Feb. 19, 2013: A baby chimp shows a variety of expressions as it sits in its mother's arms at Chimp Haven in Keithville, La.
AP Photo/Gerald Herbert

Chimps use sticks to poke into a mock termite mound

Feb. 19, 2013: Chimps use sticks to poke into a mock termite mound to taste a sweet substance placed in the mound by keepers at Chimp Haven in Keithville, La.
AP Photo/Janet McConnaughey

Research chimps enjoy retirement -- at last

For the first time in their lives, four aging chimpanzees once used in federal research can go outside whenever they like. They can lie on the grass, clamber onto a platform 20 feet up on a chimp-style jungle gym and gaze freely at the open sky, the vista unbroken by steel bars. Read more

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