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Photograh by Andreanita, Dreamstime Black rhinoceroses have a sort of attack-first-and-ask-questions-later

These enormous fish are found in tropical oceans around the world.
The opening of whale shark’s throat is covered with about 20 giant pads that have

Not far from the North Pole, the world is frozen for thousands of miles. Suddenly a snowy mound wiggles and reveals two dark eyes. The lump is transformed into the furry white body of a lone arctic fox. The canine casually shakes the blanket of snow off her thick coat—the key to her survival. But warm fur alone might not keep this fox alive during the polar winter, when temperatures rarely get above zero degrees Fahrenheit. Until spring arrives, this arctic fox will rely on some freeze-defying strategies, making it a champion of the cold.
Luckily, these small foxes have some useful adaptations for living in the icy Arctic

Blue marlins usually feed at the surface where the water is warm, but they have been
Blue marlins usually feed at the surface where the water is warm, but they have been

Monarch butterflies live in North, Central, and South America as well as Australia, some Pacific Islands, India, and Western Europe. They’re on the endangered species list. Find out how you can help protect their habitat.
Females have thicker veins in their wings.

Koalas are marsupials, related to kangaroos.
Size: 23.5 to 33.5 inches Weight: 20 pounds Most marsupials have

Learn all about these bamboo eaters.
To stay healthy, they have to eat a lot—up to 15 percent of their body weight in

Seahorses are tiny fishes that are named for the shape of their head, which looks like the head of a tiny horse. There are at least 50 species of seahorses. You’ll find them in the world’s tropical and temperate coastal waters, swimming upright among seaweed and other plants. Seahorses use their dorsal fins (back fins) to propel slowly forward. To move up and down, seahorses adjust the volume of air in their swim bladders, which is an air pocket inside their bodies. Tiny, spiny plates cover seahorses‘ bodies all the way down to their curled, flexible tails. The tail can grasp objects, helpful when seahorses want to anchor themselves to vegetation. A female seahorse lays dozens, sometimes hundreds, of eggs in a pouch on the male seahorse’s abdomen. Called a brood pouch, it resembles a kangaroo’s pouch for carrying young. Seahorse young hatch after up to 45 days in the brood pouch. The baby seahorses, each about the size of a jelly bean, find other baby seahorses and float together in small groups, clinging to each other using their tails. Unlike kangaroos, baby seahorses do not return to the pouch. They must find food and hide from predators as soon as they’re born.
These fish don’t have true stomachs, just a digestive tube, so they need to eat all

A moose swims across a mountain lake, reaching the shore alongside a forest. The moose’s antlers—which stretch nearly six feet wide from tip to tip—drip water as the animal exits the water and trots toward the forest. The massive moose (weighing nearly 2,000 pounds) is the largest animal in the deer family.
ALL-WEATHER CHAMP Moose primarily live in areas that have cold, snowy winters.

Today, bison numbers have rebounded somewhat, and about 200,000 bison live on preserves
Today, bison numbers have rebounded somewhat, and about 200,000 bison live on preserves