Thailand's beloved pygmy hippo Moo Deng marks her first birthday at Khao Kheow Open Zoo, drawing fans from afar despite her fading internet fame.

A birthday bash fit for a queen — or at least a very cute hippo.

Activist Tommy Garnett's decades of work paid off when Sierra Leone's Tiwai island -- a lush forest home to one of the world's highest concentrations of primates -- landed a spot Sunday on the UN ...

Adoring fans from around the world converged in Thailand this week to celebrate the first birthday of Moo Deng, the baby pygmy hippo who became a social media sensation. John Yang reports.

Thousands of fans have flocked to a Thailand zoo to celebrate the first birthday of Moo Deng, the baby pygmy hippo that's ...

Tanganyika Wildlife Park in Kansas welcomed a new baby pygmy hippo. The boy might just become a new internet celebrity.

A male pygmy hippo – the same species as Thailand's viral Moo Deng – was born at Tanganyika Wildlife Park in Goddard, Kansas ...

SAN DIEGO — A pygmy hippo that was rescued more than two decades ago broke a world record, according to San Diego Humane Society. When Hannah Shirley is hungry, the personality-filled pygmy hippo ...

Pygmy hippos are rarer and more reclusive than the common hippo. They are also nocturnal, foraging the forests for grasses, fruits, ferns, and other plants at night.

The Melbourne Zoo in Australia shares footage of the most adorable pygmy hippo taking its first swim in the big pool with its mom.

The pygmy marmoset holds the distinguished title of being the world's smallest monkey and one of the tiniest primates on Earth.

A six-year-old Thai boy with terminal cancer was able to meet the internet-famous pygmy hippo Moo Deng as his final wish.