The world’s tiniest submarine offers a cramped peek at underwater life.

Reggie, a 7-year-old Great Dane from Idaho, and Pearl, a 4-year-old Chihuahua from Florida, put their (size) differences ...

Just like one commenter said, Pearl is "barely the size of [Reggie's] ear!" This adorable duo met up in Idaho, where the ...

Reggie, a 7-year-old Great Dane who stands at a staggering 3 feet 4 inches, and Pearl, a 4-year-old Chihuahua who measures in ...

There are fewer than 1,000 Bornean elephants left in the wild. Logging and palm oil plantations have destroyed their habitat ...

Guinness World Records shared video from the historic meeting between the world's tallest living dog -- standing 3 feet, 3 inches tall -- and the world's shortest dog, who stands at 3.59 inches tall.

"25 World's SMALLEST Animals You Won't Believe Are Real" will blow your mind with just how tiny nature can get! From microscopic frogs to mini monkeys, these adorable (and sometimes bizarre) creatures ...

Stories of animals once thought extinct and reappearing after centuries give moments of hope and remind us that nature can be ...