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Wombats produce cube-shaped poop because their intestines have regions with different mechanical properties. As digested material moves through the final part of the intestine, it becomes drier and is shaped by repeated muscular contractions. Researchers found that alternating stiffer and more flexi
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Wombats produce cube-shaped poop because their intestines have regions with different mechanical properties. As digested material moves through the final part of the intestine, it becomes drier and is shaped by repeated ···
Yes, snails have teeth, but they are very different from human teeth. Most snails feed using a specialized ribbon-like structure called a radula, which is covered with rows of tiny tooth-like projections. These microscop···
No, porcupines cannot shoot their quills. Their quills are specialized hairs that stand upright when the animal is threatened, but they cannot be fired like arrows or launched at a distant predator. Instead, quills detac···
Yes, butterflies can taste with their feet. Many butterflies have specialized chemical sensors called gustatory sensilla on their legs, particularly on the lower foot segments known as tarsi. When a butterfly lands on a ···
How do bats navigate in darkness? Discover how echolocation works, why bats use ultrasonic calls, how they catch insects, and whether bats can see.
Sloths move so slowly because their bodies are adapted to conserve energy. Their low-energy diets, unusually low metabolic rates, slow digestion, and economical methods of regulating body temperature all favor a lifestyl···
How do octopuses change color? Discover how chromatophores, reflective cells and skin papillae help octopuses camouflage and communicate.
Yes, whales sleep, but they do not sleep exactly like humans. Whales are air-breathing mammals, so they must continue reaching the surface to breathe while resting. Research on dolphins and other cetaceans has revealed a···
Yes, birds can smell. Most birds possess an olfactory system, although their sensitivity to odors varies widely among species. Turkey vultures can use smell to locate carrion, some albatrosses and petrels detect airborne···
Why do fireflies glow? Learn how luciferin and luciferase produce light, why lightning bugs flash to find mates, and how light pollution affects them.
Why do cats knead blankets and people? Learn why cats make biscuits, what it means when they purr, and when kneading might signal stress.
Why do chameleons change color? Learn how skin nanocrystals create color, why chameleons signal to rivals, and how temperature affects their appearance.
Yes, some frogs can survive being frozen and become active again after thawing. The best-known example is the wood frog (Lithobates sylvaticus), which can tolerate ice forming in substantial portions of its body during w···
Is a snake a reptile or amphibian? Learn why snakes are reptiles, how their scales, lungs, eggs and evolution differ from frogs and salamanders.
Rabbits make several different sounds, including soft grunts, honks, squeaks, growls, screams, and gentle tooth-grinding noises often called purring. They are usually much quieter than dogs or cats, and they communicate ···
No, jellyfish do not have brains, but they do have nervous systems. Instead of a centralized brain like those found in humans, fish, and many other animals, jellyfish possess networks of nerve cells distributed throughou···
Sea otters sometimes hold hands, or more accurately paws, while resting on the ocean surface to help prevent themselves from drifting apart. However, this behavior is much less common in the wild than popular photographs···
Do sharks have bones? Learn why shark skeletons are made of cartilage, whether sharks have backbones and ribs, and how shark fossils form.
Can owls move their eyes? Discover why owl eyes are fixed, how far owls turn their heads, and how their unusual eyes help them hunt at night.
Do frogs drink water through their mouths? Discover how frogs absorb water through their skin, what the drinking patch does, and how they stay hydrated.
Do turtles have teeth? Discover how turtles bite, eat, and crush food with their beaks, plus why baby turtles have a temporary egg tooth.
Can snakes blink or close their eyes? Learn why snakes have no eyelids, how their eye caps work, and how snakes sleep and shed their skin.
The Kangal is often said to have the strongest dog bite, but the famous PSI rankings are poorly supported. See what scientific dog bite-force studies actually show.
Cats can kill and eat rats, especially smaller ones, but large adult rats can be difficult prey. Learn what cats hunt, whether cats control rats and the health risks.