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Discover 10 dangerous sea creatures, from box jellyfish and stonefish to blue-ringed octopuses, sea snakes and sharks, and learn what makes each risky.
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Discover 10 dangerous sea creatures, from box jellyfish and stonefish to blue-ringed octopuses, sea snakes and sharks, and learn what makes each risky.
Discover 12 spectacular colorful frogs, from blue poison frogs and red-eyed tree frogs to golden mantellas, rainbow frogs and harlequin frogs.
What is the strongest big cat? Compare tigers, jaguars, lions and leopards by body size, bite strength, lifting ability and hunting power.
Which animal is the king of animals? The lion is the traditional answer, but tigers, orcas, polar bears and other species dominate different habitats.
What are quadruped animals? See 18 four-legged examples, learn the difference between quadrupeds and tetrapods, and understand walking, trotting and galloping gaits.
What animal has the best endurance? Compare swifts, godwits, pronghorns, sled dogs, humans, horses and more by flight, running and survival stamina.
Which animals struggle in cold weather? Discover 10 well-documented cold-sensitive animals, from manatees and sea turtles to iguanas, pythons and tropical fish.
Discover 10 birds with black feathers, including crows, ravens, black lories, palm cockatoos, blackbirds, drongos, grackles and black swans.
Discover 20 animals with tentacles, from jellyfish and squid to snails, caecilians and tentacled snakes, and learn how tentacles help them feed, sense and survive.
Meet 10 of the cutest monkeys in the world, from pygmy marmosets and tamarins to snub-nosed monkeys, with habitats, traits and conservation facts.
Discover 20 animals with claws, from jaguars and harpy eagles to moles, anteaters and iguanas. Compare claw types and how animals use them to hunt, climb and dig.
Which animals do not move? Meet 8 sessile animals including sponges, corals, barnacles, sea squirts and oysters, and learn how they feed and reproduce while attached.
Searching for gembok? The correct spelling is gemsbok. Learn Oryx gazella size, habitat, diet, horns, desert adaptations, predators and conservation status.
What is the strongest mantis? Compare 10 large and powerful praying mantises by body size, raptorial forelegs and documented hunting ability, plus whether mantises are dangerous to humans.
Which bats pose the greatest risks to humans? Explore 10 bats linked to rabies, Nipah, Marburg and other health risks, plus what to do after bat contact.
Which monkeys are the strongest? Compare 10 of the most powerful monkeys, including mandrills, drills and baboons, by size, build, canines and defensive ability.
Is an alacrán different from a scorpion? No—alacrán and escorpión are names for the same arachnid. Learn the terminology, venom myths and sting safety.
Discover 10 animals that look surprisingly human, from bonobos and gorillas to gibbons and sloths, and learn why our brains see human-like faces in animals.
What animals have feathers? See 25 examples of flying and flightless birds, learn the main feather types, their functions, and why some feathered animals cannot fly.
Which animals have no tails? Discover truly tailless and nearly tailless animals including apes, guinea pigs, frogs, koalas and capybaras, plus common myths.
Claws are one of evolution’s most versatile tools. In zoology, a claw is a narrow, downward-curving, keratinized structure at the end of a digit, and across birds, reptiles, many mammals, and some amphibians, claws have···
Discover 10 valuable goldfish varieties, including Ranchu, Tosakin, Jikin, Oranda and Bubble Eye, plus what really makes rare goldfish expensive.
Discover 10 animals with crests, including cockatoos, peafowl, penguins, geckos, iguanas and porcupines, plus how crests differ from combs and casques.
Discover 10 types of gazelles, including Dorcas, Thomson’s, dama and Speke’s gazelles, with scientific names, habitats, key traits and conservation status.