Dolphins: Dolphins have names for each other. They use unique whistles to identify and call out to specific individuals, much like humans use names.
Elephants: Elephants can “hear” with their feet. They can detect seismic signals through vibrations in the ground, which helps them communicate over long distances.
Cows: Cows have best friends and can become stressed when they are separated. They form strong social bonds with other cows.
Penguins: Male penguins propose to females by giving them a pebble. If the female accepts the pebble, they become mates.
Sloths: Sloths are excellent swimmers. They can hold their breath underwater for up to 40 minutes and are surprisingly agile in water.
Butterflies: Butterflies can taste with their feet. They use their feet to taste the leaves they land on to determine if they’re good for laying eggs.
Giraffes: Giraffes have the same number of neck vertebrae as humans—seven. However, each vertebra in a giraffe’s neck can be over 10 inches long.
Honeybees: Honeybees communicate through dance. They perform a “waggle dance” to inform other bees about the direction and distance to food sources.
Otters: Sea otters hold hands while sleeping to prevent drifting apart. This behavior, known as “rafting,” helps keep them together as a group.
Axolotls: Axolotls, a type of salamander, can regenerate almost any part of their body, including limbs, heart, spinal cord, and even parts of their brain.