These teacup-sized dogs are so tiny that sometimes you don’t even notice when someone is carrying one around in their purse. According to Guinness World Records, the smallest Chihuahua ever is named ...

Deep within the dense foliage of Papua New Guinea lives the world's smallest vertebrate. Meet Paedophryne amauensis, a terrestrial frog so small it's nearly invisible to the naked eye. Not only do ...

If we set aside elephants and blue whales for a moment and shift our focus to the other end of the size spectrum, the world of tiny animals is truly astonishing. Measured in millimeters, these ...