Science

Polar bears can hold their breath for about three minutes, although the exact limit varies with the bear and the circumstances. They are capable swimmers and can stay underwater long enough to make a short dive, but they are not aquatic mammals that can breathe underwater or remain submerged for long periods. What the three-minute […]

The flightless bird with long legs and a long neck is the ostrich, the largest living bird. Native to Africa, it cannot fly, but its powerful legs make it exceptionally fast on land and help it defend itself in open habitats. Why the Ostrich Fits the Description An ostrich is easy to recognize by its

Barn owls are often heard at night making a long, harsh screech rather than the familiar hoot many people associate with owls. They can also hiss, snore, or make softer calls, and the exact sound depends on what the bird is doing. The sound most people notice The best-known barn owl call is a drawn-out,

Volcanic soil is often fertile because weathering breaks down volcanic ash and rock into mineral-rich material, while the resulting soil can hold water and nutrients that plants need. Its fertility is not automatic: climate, soil age, drainage, organic matter, and the particular volcanic material all affect how well crops grow. What volcanic soil is Volcanic

Carnivorous plants exist because catching prey gives them nutrients that their habitats do not provide in sufficient amounts, especially nitrogen and phosphorus. They still get energy from sunlight through photosynthesis; insects and other small animals supplement their diet rather than replace it. The habitats that favor carnivory Most carnivorous plants grow in places where light

Birds seem to chirp nonstop because sound helps them communicate about territory, courtship, food, danger, and contact with other birds. Their activity rises and falls with daylight, season, weather, and surroundings, so a chorus can sound nearly continuous even though different birds are calling for different reasons. What “chirping” means Chirp is a casual word

Wasps and bees are related insects, but they are not the same: bees are generally specialized for collecting pollen and feeding their young, while many wasps hunt or scavenge other insects and foods. Both groups include many species, and both can sting, so appearance, behavior, diet, and nesting habits are more reliable clues than a

The strongest animal to ever exist depends on what “strongest” means: by strength relative to body weight, the dung beetle is a leading contender, while elephants are among the strongest animals in absolute terms. There is no single scientifically settled winner, because lifting, pulling, biting, and moving a heavy body are different feats—and fossils rarely

Many ocean animals can regrow lost or damaged body parts, but the ability varies widely: some replace arms, fins, or tails, while a few can rebuild much more of the body. Sea stars, brittle stars, crabs, octopuses, and some fish are familiar examples, though regeneration is not unlimited and usually takes time. What Regeneration Means

Snow geese and Canada geese are different species of wild goose, and their appearance, calls, behavior, and migration patterns can help tell them apart. Snow geese are usually white or dark-bodied with black wingtips, while Canada geese are recognized by a black head and neck, white cheek patch, and brownish body. Names and species The