Published: Mon, 05 Dec 2016 11:10:20 +0000
2016-12-05T11:10:20ZIn this slideshow, you'll discover the six main animal groups, ranging from the simplest (invertebrates) to the most complex (mammals).
2016-12-05T11:10:20ZDo you want to donate your money to a reputable, and effective, wildlife conservation organization? Here's our list of the 10 best, ranging from the World Wildlife Fund to the National Audubon Society.
2016-12-05T11:10:20ZA slideshow of the 12 most important animals of North America, including mammals, birds, lizards, and butterflies.
2016-12-05T11:10:20ZFrom an evolutionary perspective, mammals are the most advanced animals on our planet. Here are 10 essential facts about mammals that everyone should know.
2016-12-05T11:10:20ZHow much do you know about owls? Here are 10 essential owl facts, ranging from how these predatory birds hunt to how smart they actually are.
2016-12-05T11:10:20ZHere are the five main reptile characteristics, ranging from their vertebrate anatomies to their habit of laying hard-shelled eggs.
2016-12-05T11:10:20ZThey're nowhere near as common as they were 100 million years ago, but reptiles are still some of the most distinctive animals on earth.
2016-12-05T11:10:20ZA crucial link between water-dwelling fish and land-dwelling reptiles, amphibians are among the most fascinating animals on earth. Here are 10 fascinating amphibian facts.
2016-12-05T11:10:20ZWhat can you do to help protect wildlife? Here are 10 useful ideas, ranging from keeping your cat indoors to throwing away your bug zapper.
2016-12-05T11:10:20ZArthropods--which include insects, spiders, and crustaceans--are by far the most common animals on earth. Here's a slideshow of 10 essential arthropod facts.
2016-12-05T11:10:20ZWith their eight tentacles and bigger-than-average brains, octopuses are among the world's most fascinating creatures. Here's a slideshow of 10 essential octopus facts.
2016-12-05T11:10:20ZThe vast majority of animals on earth are invertebrates—animals that lack backbones and internal skeletons. Here are 10 invertebrate facts everyone should know.
2016-12-05T11:10:20ZAnimals are characterized by their wide array of organ systems, which help these organisms breathe, reproduce, and respond to their environment. Here's a slideshow of the 12 main animal organ systems.
2016-12-05T11:10:20ZOne of the six basic groups of animals, birds are characterized by their feathers and (in most species) the ability to fly. Here are 10 essential bird facts everyone should know.
2016-12-05T11:10:20ZWhat exactly is it that defines an animal? Here's a slideshow of the eight main animal characteristics, ranging from multicellularity to sexual reproduction.
2016-12-05T11:10:20ZHere's a peek at the jellyfish life cycle, all the way from fertilized egg to full-grown adult.
2016-12-05T11:10:20ZWhat makes mammals different from other vertebrate animals? Here's a slideshow of the eight main mammal characteristics, ranging from hair to four-chambered hearts.
2016-12-05T11:10:20ZExplore the nitty gritty of population biology, a fascinating branch of zoology that investigates the ways in which populations change over time.
2016-12-05T11:10:20ZFish, corals, molluscs, echinoderms, sea snakes, sponges, birds, and mammals all make their home on the Great Barrier Reef. Here's a look at the most notable animals of this famous marine habitat.
2016-12-05T11:10:20ZLearn interesting facts about marsupials and find out about the characteristics make them different from other animal groups, their life cycle and their evolutionary history.
2016-12-05T11:10:20ZIn this slideshow, you'll learn about the 30 main bird groups, ranging from albatrosses to woodpeckers.
2016-12-05T11:10:20ZScientists and conservationists who study the animal species that face a high risk of extinction refer to such species as endangered species.
2016-12-05T11:10:20ZNinety-five percent water, equipped with millions of stinging cells, jellyfish are some of the most beautiful (and most dangerous) animals on earth.
2016-12-05T11:10:20ZMollusks include creatures as widely divergent in appearance and behavior as snails, clams and cuttlefish. In this slideshow, you'll learn 10 facts about these fascinating invertebrates.
2016-12-05T11:10:20ZA comprehensive list of the world's biggest mammals by type, ranging from whales to hedgehogs.
2016-12-05T11:10:20ZWith their long necks, richly patterned coats and stubby ossicones, Giraffes are among the most recognizable animals on earth. Here are 10 essential Giraffe facts.
2016-12-05T11:10:20ZExplore the vast diversity of animal life, from arrow worms to waterbears, and discover how these remarkable organisms differ from all other living things.
2016-12-05T11:10:20ZGet a glimpse of some of the most adorable birds alive today and discover why each species is more than just cute, it is also entirely unique.
2016-12-05T11:10:20ZAll living organisms can be sorted into one of two groups depending on the fundamental structure of their cells - prokaryotes or eukaryotes.
2016-12-05T11:10:20ZHere are 10 essential bear facts, ranging from how these animals hibernate to how they communicate.
2016-12-05T11:10:20ZAn introduction to the four basic groups of reptiles including crocodilians, lizards, snakes and turtles.
2016-12-05T11:10:20ZGreat horned owls are a large species of true owls that inhabits many parts of North and South America.
2016-12-05T11:10:20ZDiscover how the innovation of a supportive backbone enabled the vertebrates to stand tall and go beyond their chordate ancestors.
2016-12-05T11:10:20ZDecode some of the jargon that is used in the science of ecology to describe natural communities, populations, and ecosystems.
2016-12-05T11:10:20ZAn A to Z list of animal profiles available at this site, sorted alphabetically by scientific name.
2016-12-05T11:10:20ZIt gets complicated when species share the same habitat. This guide will help you to untangle the many interactions that arise when species mingle.
2016-12-05T11:10:20ZAre you familiar with the 21 orders, or groups, of mammals? This slideshow will take you on a guided tour, ranging from tiny aardvarks (order Tubulidentata) to much bigger whales and dolphins (order Cetacea).
2016-12-05T11:10:20ZLiving organisms face a constant barrage of external stresses or threats that challenge their ability to survive and reproduce.
2016-12-05T11:10:20ZFrom leaves and grasses to fish and crustaceans, the diet of today's turtles is really quite varied.
2016-12-05T11:10:20ZSquamates are a group of reptiles that sheds their skin periodically in patches and have uniquely jointed skulls and jaws.
2016-12-05T11:10:20ZDecode the secrets of amphibian classification in this beginner's guide to the three basic amphibian groups.
2016-12-05T11:10:20ZThe lion is a species of large cat that has a buff colored coat, white underparts, and a long tail that ends in a black tuft of fur.
2016-12-05T11:10:20ZBy 110 million years ago, mammals had diverged into two groups: the placental mammals and the marsupial mammals.
2016-12-05T11:10:20ZChimpanzees are second only to humans in the variety of tools they use and the innovative ways they employ those tools.
2016-12-05T11:10:20ZThe world's oceans, lakes, and rivers harbor tens of thousands of fish species. Here are 10 essential facts about fish that everyone should know.
2016-12-05T11:10:20ZFind out how scientists estimate and count the many millions of animal species that live on our planet today.
2016-12-05T11:10:20ZGain an intimate view of the social lives of lions, the only species of cat that hangs out in groups called prides.
2016-12-05T11:10:20ZProfile of the Appalachian Mountain Range, an ancient band of mountains that stretches in a southwestern arc from Newfoundland to Alabama.
2016-12-05T11:10:20ZSnowy owls are large owls with white plumage and their extreme northerly range which includes tundra habitat throughout Alaska, Canada and Eurasia.
2016-12-05T11:10:20ZLearn interesting facts about dolphins and find out about the characteristics make them different from other animal groups, their life cycle and their evolutionary history.
2016-12-05T11:10:20ZExpand your understanding of animals and learn some of the basics behind their biology as well as a handful of lesser-known animal facts.
2016-12-05T11:10:20ZAn introduction to the basic fish groups including bony fishes and cartilaginous fishes.
2016-12-05T11:10:20ZDiscover the remarkable ways that animals are shaped by the natural environment in which they live.
2016-12-05T11:10:20ZSexual dimorphism is the difference in form between male and female members of the same species.
2016-12-05T11:10:20ZAn overview of vertebrate evolution that explores the key developments in the evolution of mammals, birds, reptiles, amphibians, and fish.
2016-12-05T11:10:20ZZoology is the study of animals; yet this definition implies a simplicity that does not exist; instead, zoology is a complex discipline, drawing upon a diverse body of scientific observation and theory.
2016-12-05T11:10:20ZA slideshow of the 31 different types of invertebrates, ranging from amoeba-like placozoans to worms, lobsters, and octopuses.
2016-12-05T11:10:20ZThe aquatic biome consists of habitats around the world that are dominated by water, from tropical reefs, to brackish mangroves, to Arctic lakes.
2016-12-05T11:10:20ZAn A to Z list of animal profiles available in The Animal Encyclopedia, sorted alphabetically by common name.
2016-12-05T11:10:20ZDescent with modification refers to the passing on of traits from parent organisms to their offspring.
2016-12-05T11:10:20ZMyriapods are a group of arthropods that includes millipedes, centipedes, pauropods, and symphylans. Myriapods are noted for their having many legs.
2016-12-05T11:10:20ZThe Great Barrier Reef is the largest coral reef in the world. It is located off the shores of eastern Australia from Bamaga to Bundaberg, Queensland.
2016-12-05T11:10:20ZDespite their name, gray wolves are colorful canines. Their coat color ranges from white to gray to black and is regulated by complex genetic factors.
2016-12-05T11:10:20ZDuring the Devonian Period, about 375 million years ago, a group of vertebrates clamoured their way out of the water and onto land.
2016-12-05T11:10:20ZEchinoderms are a group of marine invertebrates that includes star fish, sea lilies, feather stars, brittle stars, sea cucumbers and sea urchins.
2016-12-05T11:10:20ZCetaceans are highly specialized mammals with numerous adaptations that make them well-suited for living in water.
2016-12-05T11:10:20ZAcross the globe, human development now fragments a once-continuous landscape into isolated patches of natural habitats.
2016-12-05T11:10:20ZA slideshow of the most notable animals inhabiting the Amazon River Basin, including toucans, sloths and piranhas.
2016-12-05T11:10:20ZCarnivores, including dogs, cats, hyenas, and other mammals, are some of the most dangerous animals on earth. Here are 10 carnivore facts everyone should know.
2016-12-05T11:10:20ZHere's a guide to the favorite meals of the major reptile groups: snakes, turtles, crocodiles, lizards, and tuataras.
2016-12-05T11:10:20ZExplore the tundra, a remarkable biome where extreme cold, long winters, and nutrient-poor soils push life to its limits.
2016-12-05T11:10:20ZDefinition of Camouflage and how it helps animals.
2016-12-05T11:10:20ZDefinition of a niche, a term used to describe the role an organism or population plays within its community or ecosystem.
2016-12-05T11:10:20ZFacts about zebras, a group of equids with a distinct black and white striping pattern.
2016-12-05T11:10:20ZSegmented worms are bilaterally symmetrical invertebrates that include more than 12,000 species such as earthworms, ragworms and leeches.
2016-12-05T11:10:20ZSponges are a group of simple aquatic invertebrates that include glass sponges, demisponges, and calcareous sponges.
2016-12-05T11:10:20ZJellyfish are a group of carnivorous cnidarians with a bell-shaped body and tentacles. Jellyfish are delicate, soft-bodied animals.
2016-12-05T11:10:20ZCnidarians are diverse and come in many shapes and sizes but there are some basic anatomical features that most members of the group share in common.
2016-12-05T11:10:20ZDiscover how some species can be the glue that holds an entire ecosystem together. And find out why such keystone species are sometimes the least likely critter.
2016-12-05T11:10:20ZToothed whales, as their name implies, have teeth, a characteristic that distinguishes them from their baleen whales.
2016-12-05T11:10:20ZLearn about corals and find out about their diversity, evolutionary history and the characteristics make them different from other invertebrate groups.
2016-12-05T11:10:20ZThe mammalian order of primates includes monkeys, apes, lemurs, and human beings. Here are 10 facts about primates that every scientifically literate person should know.
2016-12-05T11:10:20ZTemperate forests evolved 65 million years ago when global temperatures dropped and, in areas further from the equator, cooler climates emerged.
2016-12-05T11:10:20ZThe desert biome covers one-fifth of the earth's surface and includes habitats that receive very little rainfall each year.
2016-12-05T11:10:20ZCrocodilians are a group of large reptiles that includes crocodiles, alligators, caimans, and the gharial.
2016-12-05T11:10:20ZThe Rocky Mountains stretch through western North America from Alaska to New Mexico, forming the middle section of the Western Cordillera.
2016-12-05T11:10:20ZThe Great Lakes is a chain of five large, freshwater lakes that are located in central North America astride the Canada-Unisted States border.
2016-12-05T11:10:20ZHabitat destruction is fueled by a fast-growing human population. As human populations increase, we use more land for agriculture, cities, and towns.
2016-12-05T11:10:20ZWhen tetrapods arrived on the evolutionary stage, the world was forever changed. Find out how these unique vertebrates paved the way for life on land.
2016-12-05T11:10:20ZVipers are a group of snakes that include true vipers, bush vipers, rattlesnakes, pit vipers, adders and night adders.
2016-12-05T11:10:20ZTigers are the largest and most powerful of all cats. Tigers have a distinct orange coat, black stripes and white markings.
2016-12-05T11:10:20ZMonotremes are a group of mammals that include echidnas and the platypus.
2016-12-05T11:10:20ZBarn owls are a group of owls that have a heart-shaped face, long legs and powerful talons. Barn owls are medium-sized birds with a large wingspan.
2016-12-05T11:10:20ZFrom vertebrates to tunicates to lancelets, chordates are a diverse group of animals notable for a rather innovative structure called a notochord.
2016-12-05T11:10:20ZBrittle stars are a group of echinoderms that includes about 1500 species. Most species inhabit marine habitats with depths greater than 1500 feet.
2016-12-05T11:10:20ZTurtles are a group of reptiles best known for the hard shell which is a modification of their ribcage and vertebral column.
2016-12-05T11:10:20ZCnidarians are a group of aquatic invertebrates that includes jellyfish, corals, sea anemones and hydras.
2016-12-05T11:10:20ZExplore the fascinating world of frogs in this fact-packed guide to the most celebrated and farthest-hopping of all amphibians.
2016-12-05T11:10:20ZFamous for having five arms, starfish are fascinating invertebrates that move across the seafloor using an intricate hydraulic system and tiny tube feet.
2016-12-05T11:10:20ZMature forests often have several distinct layers including the forest floor, herb layer, shrub layer, understory, canopy, and emergents.