You can boil them, bake them, deep-freeze them, crush them, dehydrate them, or even blast them into space. It doesn’t matter—tardigrades can survive practically anything. These eight-legged aquatic animals may be small, but they’re nearly indestructible.
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When an elephant drinks, it sucks as much as 2 gallons (7.5 liters) of water into its trunk at a time. Then it curls its trunk under, sticks the tip of its trunk into its mouth, and blows. Out comes the water, right down the elephant’s throat. Since African elephants live where the sun is usually blazing hot, they use their trunks to help them keep cool. First they squirt a trunkful of cool water over their bodies. Then they often follow that with a sprinkling of dust to create a protective layer of dirt on their skin. Elephants pick up and spray dust the same way they do water—with their trunks. Elephants also use their trunks as snorkels when they wade in deep water. An elephant’s trunk is controlled by many muscles. Two fingerlike parts on the tip of the trunk allow the elephant to perform delicate maneuvers such as picking a berry from the ground or plucking a single leaf off a tree. Elephants can also use its trunk to grasp an entire tree branch and pull it down to its mouth and to yank up clumps of grasses and shove the greenery into their mouths. When an elephant gets a whiff of something interesting, it sniffs the air with its trunk raised up like a submarine periscope. If threatened, an elephant will also use its trunk to make loud trumpeting noises as a warning. Elephants are social creatures. They sometimes hug by wrapping their trunks together in displays of greeting and affection. Elephants also use their trunks to help lift or nudge an elephant calf over an obstacle, to rescue a fellow elephant stuck in mud, or to gently raise a newborn elephant to its feet. And just as a human baby sucks its thumb, an elephant calf often sucks its trunk for comfort. One elephant can eat 300 pounds (136 kilograms) of food in one day. People hunt elephants mainly for their ivory tusks. Adult females and young travel in herds, while adult males generally travel alone or in groups of their own.
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Conservationists create parks to give this species another chance to thrive.
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Trudi Trueit has written more than a hundred books for young readers, both fiction and nonfiction. Her love of writing began in fourth grade when she wrote, directed, and starred in her first play. She went on to become a TV news reporter and weather forecaster, but she knew her calling was in writing. Trueit is a gifted storyteller for middle-grade audiences, and her fiction novels include The Sister Solution, Stealing Popular, and the Secrets of a Lab Rat series. Her expertise in nonfiction for kids comes through in books on history, weather, wildlife, and Earth science. Born and raised in the Pacific Northwest, Trueit lives in Everett, Washington.
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Get pictures and fun facts about eight weird ice cream flavors.
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There are few animals on Earth who work as well together as meerkats. These squirrel-size members of the mongoose family live in groups as large as 40, and everyone in the mob participates in gathering food, keeping a look out for predators, and taking care of the babies. Meerkats live in the deserts and grasslands of the southern tip of Africa. They are extremely cute, with bushy, brown-striped fur, a small, pointed face, and large eyes surrounded by dark patches. They average about 20 inches (50 centimeters) long, including their tail. These extremely social animals live together in burrows, which they dig with their long, sharp claws. Living underground keeps mob members safe from predators and out of the harsh African heat. These burrows can be 16 feet (5 meters) long and contain multiple entrances, tunnels, and rooms. A group will use up to five separate burrows at a time. Meerkats only go outside during the daytime. Each morning, as the sun comes up, the mob emerges and begins looking for food. They use their keen sense of smell to locate their favorite foods, which include beetles, caterpillars, spiders, and scorpions. They’ll also eat small reptiles, birds, eggs, fruit, and plants. Back at the burrow, several babysitters stay behind to watch over newborn pups. This duty rotates to different members of the mob, and a sitter will often go all day without food. The babysitters‘ main job is to protect pups from meerkats in rival mobs, who will kill the babies if they can. While the rest of the mob forages for food, one or more meerkats, called a sentry, will find a high point, like a termite mound, and perch on their back legs, scanning the sky and desert for predators like eagles, hawks, and jackals. A sentry who senses danger will let out a high-pitched squeal, sending the mob scrambling for cover. Meerkats dig safe places called bolt-holes throughout their foraging area, where they can hide in an emergency. If caught in the open by a predator, a meerkat will try to look fierce, lying on its back and showing its teeth and claws. If a group is confronted, the meerkats will stand together, arching their backs, raising their hair, and hissing. This sometimes fools an attacker into thinking they are a single large, vicious animal. Meerkats are abundant throughout their range and are not considered threatened or endangered. But they live a very difficult life in the African desert, constantly threatened by hungry predators, rival meerkats, drought, and burrow-flooding rainstorms.
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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.
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Experts once thought this ginormous dino lived in water.
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Fastest mammal on land, the cheetah can reach speeds of 60 or perhaps even 70 miles (97 or 113 kilometers) an hour over short distances. It usually chases its prey at only about half that speed, however. After a chase, a cheetah needs half an hour to catch its breath before it can eat. The cheetah’s excellent eyesight helps it find prey during the day. The cheetah is hard to see because its spotted coat blends with the tall, dry grass of the plains. Suddenly, the cheetah makes a lightning dash. It knocks its prey to the ground and then bites its throat. Once found throughout Asia and Africa, cheetahs today are racing toward extinction. Loss of habitat and declining numbers of their prey combine to threaten the future of these cats. Cheetahs live and hunt mainly in open grasslands and bushy areas in parts of Africa and the Middle East. Cheetahs eat small- to medium-size animals, such as hares, impalas, wildebeest calves, and gazelles. Because of their size, strength, and predatory skills, cheetahs are considered one of the “big cats.” Tigers, lions, leopards, jaguars, and cougars are also part of this grouping. Take the big cat quiz to see how much you know about these fierce felines. Then, just for fun, see which wild cat you’re most like with our personality quiz.
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Mallard ducks are the most common and recognizable wild ducks in the Northern Hemisphere. You’ll find them near ponds, marshes, streams, and lakes, where they feed on plants, invertebrates, fish, and insects. Mallards are dabbling, or surface-feeding, ducks because they eat by tipping underwater for food—head down, feet and tail in the air—rather than diving. Mallards also forage and graze for food on land. The male mallard duck, called a drake, sports a glossy green head, a white ring around its neck and a rich, chestnut-brown breast. The mottled brown female mallard looks downright dull next to the male’s showy feathers. The mallard duck’s outer feathers are waterproof, thanks to oil that’s secreted from a gland near the tail. Beneath this tightly packed waterproof layer of feathers lies a soft, warm layer of feathers called down. Twice a year, mallards molt, or shed, their flight feathers, temporarily grounding the birds for several weeks until the feathers grow back. Mallards fly in groups called flocks. Like most migratory birds, mallards fly in the famous V formation. During winter migration, mallards fly south in search of warm weather, often resting at the same spots year after year. Migrating mallards can travel great distances, relying on rivers, coasts, and valleys to find their way. A female mallard lays up to a dozen eggs in nests on the ground near water, often in a small depression or tree hole. She lines the nest with warm down plucked from her undercoat. Soon after birth, baby ducks, called ducklings, open their eyes. A little more than a day after hatching, ducklings can run, swim, and forage for food on their own. They stay in the nest for less than a month. A group of ducklings is called a brood. Outside the nest, the brood sticks close by the mother for safety, often following behind her in a neat, single-file line.
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