"It was proposed that the presence of pentobarbital in dog food may have caused dogs to become less responsive to the drug when being euthanized. However, a 2002 FDA study found no dog or cat DNA in the foods they tested, so it was theorized that the drug found in dog food came from euthanized cattle and horses. Furthermore, the level of the drug found in pet food was safe. Animal euthanasia Animal euthanasia (euthanasia from ; ""good death"") is the act of putting an animal to death or allowing it to die by withholding extreme medical measures. Reasons for"
"Hippopotamus The common hippopotamus (""Hippopotamus amphibius""), or hippo, is a large, mostly herbivorous, semiaquatic mammal native to sub-Saharan Africa, and one of only two extant species in the family Hippopotamidae, the other being the pygmy hippopotamus (""Choeropsis liberiensis"" or ""Hexaprotodon liberiensis""). The name comes from the ancient Greek for ""river horse"" (). After the elephant and rhinoceros, the common hippopotamus is the third-largest type of land mammal and the heaviest extant artiodactyl. Despite their physical resemblance to pigs and other terrestrial even-toed ungulates, the closest living relatives of the Hippopotamidae are cetaceans (whales, dolphins, porpoises, etc.) from which they diverged"
"Herpetology Herpetology (from Greek ἑρπετόν ""herpetón"", meaning ""reptile"" or ""creeping animal"") is the branch of zoology concerned with the study of amphibians (including frogs, toads, salamanders, newts, and caecilians (gymnophiona)) and reptiles (including snakes, lizards, amphisbaenids, turtles, terrapins, tortoises, crocodilians, and the tuataras). Birds, which are cladistically included within Reptilia, are traditionally excluded here; the scientific study of birds is the subject of ornithology. Thus, the definition of herpetology can be more precisely stated as the study of ectothermic (cold-blooded) tetrapods. Under this definition ""herps"" (or sometimes ""herptiles"" or ""herpetofauna"") exclude fish, but it is not uncommon for herpetological and"
"Surprise egg"" of the Italian chocolate company Ferrero SpA. Hippopotamus The common hippopotamus (""Hippopotamus amphibius""), or hippo, is a large, mostly herbivorous, semiaquatic mammal native to sub-Saharan Africa, and one of only two extant species in the family Hippopotamidae, the other being the pygmy hippopotamus (""Choeropsis liberiensis"" or ""Hexaprotodon liberiensis""). The name comes from the ancient Greek for ""river horse"" (). After the elephant and rhinoceros, the common hippopotamus is the third-largest type of land mammal and the heaviest extant artiodactyl. Despite their physical resemblance to pigs and other terrestrial even-toed ungulates, the closest living relatives of the Hippopotamidae are"
"offer a major in herpetology at the undergraduate or even the graduate level. Instead, persons interested in herpetology select a major in the biological sciences. The knowledge learned about all aspects of the biology of animals is then applied to an individual study of herpetology. Herpetology Herpetology (from Greek ἑρπετόν ""herpetón"", meaning ""reptile"" or ""creeping animal"") is the branch of zoology concerned with the study of amphibians (including frogs, toads, salamanders, newts, and caecilians (gymnophiona)) and reptiles (including snakes, lizards, amphisbaenids, turtles, terrapins, tortoises, crocodilians, and the tuataras). Birds, which are cladistically included within Reptilia, are traditionally excluded here; the"
"Hoplology Hoplology is a science that studies human combative behavior and performance. The word ""hoplology"" is derived from the Greek terms ""hoplos"" (a mythical plate-armored animal) and ὅπλον ""hóplon"", a wooden shield carried by some warriors in ancient Greece. The word ""hoplite"", derived from ""hoplon"", is the term for the classical Greek warrior who carried such a shield. The field originates in the 19th century with Sir Richard Burton; although the origin of the word is often attributed to Burton, there are earlier references to it. Despite the work of Burton and a few others, it was not until the"
"Hippocampus (mythology) The hippocampus or hippocamp, also ""hippokampoi"" (plural: hippocampi or hippocamps; , from , ""horse"" and , ""sea monster""), often called a sea-horse in English, is a mythological creature shared by Phoenician, Etruscan, and Greek mythology, though its name has a Greek origin. The hippocampus has typically been depicted as having the upper body of a horse with the lower body of a fish. Coins minted at Tyre around the 4th century BC show the patron god Melqart riding on a winged hippocampus and accompanied by dolphins. Coins of the same period from Byblos show a hippocampus diving under"
"depicting bonobo copulation than to non-sexual stimuli. Zoophilia has been partly discussed by several sciences: Psychology (the study of the human mind), sexology (a relatively new discipline primarily studying human sexuality), ethology (the study of animal behavior), and anthrozoology (the study of human-animal interactions and bonds). The nature of animal minds, animal mental processes and structures, and animal self-awareness, perception, emotion in animals, and ""map of the world"", are studied within animal cognition and also explored within various specialized branches of neuroscience such as neuroethology. In the fifth edition of the ""Diagnostic and Statistical Manual of Mental Disorders"" (DSM-5), zoophilia"
"Equinophobia Equinophobia or hippophobia is a psychological fear of horses. ""Equinophobia"" is derived from the Greek word φόβος (""phóbos""), meaning ""fear"" and the Latin word ""equus"", meaning ""horse"". The term ""hippophobia"" is also derived from the Greek word ""phóbos"" with the prefix derived from the Greek word for horse, ἵππος (""híppos""). An example of the phobia can be found in Freud's psychoanalytic study of Little Hans. The following symptoms can be exhibited when a person suffering from equinophobia either thinks of a horse or is physically near one: Sufferers of equinophobia may also fear other hoofed animals such as donkeys,"
"Hippodraco Hippodraco (""horse"" (""hippos"" in Greek) and ""dragon"" (""draco"" in Latin)) is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the Lower Cretaceous period (Upper Barremian-lowermost Aptian age, about 124 million years ago) in what is now Utah, United States. Its type specimen, UMNH VP 20208, is the associated skeleton of a single individual, including a nearly complete skull and partial postcranium. This specimen was recovered from the Yellow Cat Member of the Cedar Mountain Formation, Utah. ""Hippodraco"" was named by Andrew T. McDonald, James I. Kirkland, Donald D. DeBlieux, Scott K. Madsen, Jennifer"
"Horse The horse (""Equus ferus caballus"") is one of two extant subspecies of ""Equus ferus"". It is an odd-toed ungulate mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature, ""Eohippus"", into the large, single-toed animal of today. Humans began domesticating horses around 4000 BC, and their domestication is believed to have been widespread by 3000 BC. Horses in the subspecies ""caballus"" are domesticated, although some domesticated populations live in the wild as feral horses. These feral populations are not true wild horses, as this term"
"the review of Boisserie (2005). Hippopotamidae Hippopotamuses are stout, naked-skinned, and amphibious artiodactyl mammals, possessing three-chambered stomachs and walking on four toes on each foot. While they resemble pigs physiologically and are pseudoruminants like camels, their closest living relatives are the cetaceans. Hippopotamuses are the only living members of the family Hippopotamidae. There are two living species of hippopotamus in two genera; the pygmy hippo, ""Choeropsis liberiensis"" of the forests of west Africa, and the common hippo, ""Hippopotamus amphibius"". Hippopotamuses are large mammals, with short, stumpy legs, and barrel-shaped bodies. They have large heads, with broad mouths, and nostrils placed"
"nature as both human and divine. Hippogriff The hippogriff, or sometimes spelled hippogryph (), is a legendary creature which has the front half of an eagle and the hind half of a horse. The first recorded mention of the hippogriff was made by the Latin poet Virgil in his ""Eclogues"". Though sometimes depicted during the Classical Era and during the rule of the Merovingians, it was used by Ludovico Ariosto in his ""Orlando Furioso"", at the beginning of the 16th century. Within the poem, the hippogriff is a steed born of a mare and a griffin—it is extremely fast and"
"a horse. For extreme cases, it may also be necessary to use medication, even though its effects are only short term. Equinophobia Equinophobia or hippophobia is a psychological fear of horses. ""Equinophobia"" is derived from the Greek word φόβος (""phóbos""), meaning ""fear"" and the Latin word ""equus"", meaning ""horse"". The term ""hippophobia"" is also derived from the Greek word ""phóbos"" with the prefix derived from the Greek word for horse, ἵππος (""híppos""). An example of the phobia can be found in Freud's psychoanalytic study of Little Hans. The following symptoms can be exhibited when a person suffering from equinophobia either"
"Hippalectryon A hippalectryon or hippalektryon (), is a type of fantastic hybrid creature of Ancient Greek folklore, half-horse (front) and half-rooster (hind), including the tail, wings and hind legs. Its colour varies between yellow and reddish. No myths related to it are currently known. The oldest representation currently known dates back to the 9th century BCE, and the motif grows most common in the 6th century, notably in vase painting and sometimes as statues, often shown with a rider. It is also featured on some pieces of currency. A few literary works of the 5th century mention the beast, most"
"Jay Gould wrote an essay about it (""The Case of the Creeping Fox Terrier Clone"", essay #10 in his book, ""Bully for Brontosaurus),"" in which he concluded that Henry Fairfield Osborn had so described it in a widely distributed pamphlet. The reasons for this comparison are unclear, but Gould posits that Osborn, a keen fox hunter, could have made a natural association between horses and the dogs that accompany them. Eohippus Eohippus is an extinct genus of small equid ungulates. The only species is ""E. angustidens"", which was long considered a species of ""Hyracotherium"". Its remains have been identified in"
"notably Aeschylus and Aristophanes, who used it as one of his favourite insults. The precise function of the Hippalectryon remains a mystery; as an apotropaic and prophylactic animal, it might have been dedicated to Poseidon and tasked to protect ships. Other studies interpret it as a grotesque beast to amuse children, or a simple fantastic decorative element without any specific function. The term ""hippalectryon"", also transcribed ""hippalektryon"", comes directly from Ancient Greek ""ἱππαλεκτρυών"", a compound word that comprises ἵππος (""híppos"", ""horse""), and ἀλεκτρυών (""alektryốn"", ""rooster""). The name is thus a plain description of the hybrid creature. The name seems to"
"Hippogriff The hippogriff, or sometimes spelled hippogryph (), is a legendary creature which has the front half of an eagle and the hind half of a horse. The first recorded mention of the hippogriff was made by the Latin poet Virgil in his ""Eclogues"". Though sometimes depicted during the Classical Era and during the rule of the Merovingians, it was used by Ludovico Ariosto in his ""Orlando Furioso"", at the beginning of the 16th century. Within the poem, the hippogriff is a steed born of a mare and a griffin—it is extremely fast and is presented as being able to"
"of a goat and the rear half of a fish. Canonical figures, most of which were not themselves cult images, and coins of the Carian goddess associated with Aphrodite as the ""Aphrodite of Aphrodisias"" through ""interpretatio graeca"", show the goddess riding on a sea-goat. Brody describes her thus: Aside from ""aigikampoi"", the fish-tailed goats representing Capricorn, other fish-tailed animals rarely appeared in Greek art, but are more characteristic of the Etruscans. These include ""leokampoi"" (fish-tailed lions), ""taurokampoi"" (fish-tailed bulls) or ""pardalokampoi"" (fish-tailed leopards). Hippocampus (mythology) The hippocampus or hippocamp, also ""hippokampoi"" (plural: hippocampi or hippocamps; , from , ""horse"" and"
"Whippomorpha Whippomorpha is the clade containing the Cetacea (whales, dolphins, etc.) and their closest living relatives, the hippopotamuses, named by Waddell et al. (1999). It is defined as a crown group, including all species that are descendants of the most recent common ancestor of ""Hippopotamus amphibius"" and ""Tursiops truncatus"". This would be a sub-grouping of the Cetartiodactyla (which also includes pigs and ruminants). It is not clear how recently whales and hippos share a common ancestor, though the genetic evidence is strong that the cetaceans arose from within the Artiodactyla, thus making the even-toed ungulate grouping a paraphyletic one. Whippomorpha"
"19th century. Similar to Hunter, his courses were composed of lectures and laboratory practical classes in contrast to the previous format of lectures only. Gradually zoology expanded beyond Huxley's comparative anatomy to include the following sub-disciplines: Related fields: Zoology Zoology () or animal biology is the branch of biology that studies the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems. The term is derived from Ancient Greek ζῷον, ""zōion"", i.e. ""animal"" and λόγος, ""logos"", i.e. ""knowledge, study"". The history of zoology traces the"
"injuries. When hippos become over-populated or a habitat is reduced, bulls sometimes attempt infanticide, but this behaviour is not common under normal conditions. Incidents of hippo cannibalism have been documented, but this is believed to be the behaviour of distressed or sick hippos. Hippopotami appear to communicate vocally, through grunts and bellows, and they may practice echolocation, but the purpose of these vocalizations is currently unknown. Hippos have the unique ability to hold their heads partially above the water and send out a cry that travels through both water and air; individuals respond above and under water. Hippos will also"
"its hoof) which did not touch the ground. ""Hipparion"" was about tall at the shoulder. Three specimens were examined by Legendre and Roth for body mass. Hipparion Hipparion (Greek, ""pony"") is an extinct genus of horse that lived in North America, Asia, Europe, and Africa during the Miocene through Pleistocene ~23 Mya—781,000 years ago, existing for 22 million years. Its habitat or biome would be that of non-forested, grassy plains, shortgrass prairie or steppes. ""Hipparion"" was named by de Christol (1832) with it assigned the type European ""H. prostylum"". It was assigned to Equidae by de Christol (1832), Thurmond and"
"The Phoenix II. The Hoopoe III. The Siren IV. The Horsefly V. The Onocentaur Fragment B: I. The Hydra II. The Goat III. The Wild Ass IV. The Monkey V. The Heron VI. The Coot VII. The Panther VIII. The Whale IX. The Partridge X. The Onocentaur XI. The Weasel XII. The Asp XIII. The Turtle Dove XIV. The Deer XV. The Salamander XVI. The Kite XVII. The Boar XVIII. The Night Heron XIX. The Elephant Latin versions of the Physiologus often contained a myriad of entries that ranged from exotic quadrupeds to mythical beasts to birds, trees and stones."
"Hippopotamidae Hippopotamuses are stout, naked-skinned, and amphibious artiodactyl mammals, possessing three-chambered stomachs and walking on four toes on each foot. While they resemble pigs physiologically and are pseudoruminants like camels, their closest living relatives are the cetaceans. Hippopotamuses are the only living members of the family Hippopotamidae. There are two living species of hippopotamus in two genera; the pygmy hippo, ""Choeropsis liberiensis"" of the forests of west Africa, and the common hippo, ""Hippopotamus amphibius"". Hippopotamuses are large mammals, with short, stumpy legs, and barrel-shaped bodies. They have large heads, with broad mouths, and nostrils placed at the top of their"
"Hipposaurus Hipposaurus ('horse lizard') is an extinct genus of basal therapsids known from the ""Tapinocephalus"" Assemblage Zone of the Main Karoo Basin, South Africa. Chronologically this is within the Capitanian stage of the Guadalupian Series (Middle Permian). The genus was first described by S.H. Haughton as ""H. boonstrai"" on the basis of a skull and associated skeleton and was later considered a gorgonopsian in the family 'Ictidorhinidae' by Robert Broom. It is now considered a basal biarmosuchian, but its affinities remain uncertain. ""H.boonstrai"" is currently known from only two specimens in the Iziko South African Museum, Cape Town. """"H.brinki"""" is"
"a mental treatment at this time unless future evidence shows a benefit for treating specific disorders. Hippotherapy is an intervention used by a physical therapist, recreational therapist, occupational therapist, or speech and language pathologist. The movement of the horse affects a rider's posture, balance, coordination, strength and sensorimotor systems. It is thought that the warmth and shape of the horse and its rhythmic, three-dimensional movement along with the rider's interactions with the horse and responses to the movement of the horse can improve the flexibility, posture, balance and mobility of the rider. It differs from therapeutic horseback riding because it"
"a short plural. Hippopotamuses are gregarious, living in groups of up to thirty animals. A group is called a pod, herd, dale, or bloat. The hippopotamus is the type genus of the family Hippopotamidae. The pygmy hippopotamus belongs to a different genus in Hippopotamidae, either ""Choeropsis"" or ""Hexaprotodon."" Hippopotamidae are sometimes known as hippopotamids. Sometimes, the subfamily Hippopotaminae is used. Further, some taxonomists group hippopotamuses and anthracotheres in the superfamily Anthracotheroidea. Hippopotamidae are classified along with other even-toed ungulates in the order Artiodactyla. Other artiodactyls include camels, cattle, deer and pigs, although hippopotamuses are not closely related to these groups."
"the study of both reptiles and amphibians is called herpetology. The word ""amphibian"" is derived from the Ancient Greek term ἀμφίβιος (""amphíbios""), which means ""both kinds of life"", ""ἀμφί"" meaning ""of both kinds"" and ""βιος"" meaning ""life"". The term was initially used as a general adjective for animals that could live on land or in water, including seals and otters. Traditionally, the class Amphibia includes all tetrapod vertebrates that are not amniotes. Amphibia in its widest sense (""sensu lato"") was divided into three subclasses, two of which are extinct: The actual number of species in each group depends on the"
"are imported, and the rest are purpose-bred in Europe. Around 74% of these imports come from China, with most of the rest coming from Mauritius and Israel. NHPs are used in research into HIV, neurology, behavior, cognition, reproduction, Parkinson's disease, stroke, malaria, respiratory viruses, infectious disease, genetics, xenotransplantation, drug abuse, and also in vaccine and drug testing. According to The Humane Society of the United States, chimpanzees are most often used in hepatitis research, and monkeys in SIV research. Animals used in hepatitis and SIV studies are often caged alone. Eighty-two percent of primate procedures in the UK in 2006"
"in the adaptations of their teeth. It was nevertheless believed that cetaceans and anthracothereres descended from a common ancestor, and that hippopotamuses developed from anthracotheres. A study published in 2015 was able to confirm this, but also revealed that hippopotamuses were derived from older anthracotheriens. The newly introduced genus ""Epirigenys"" from eastern Africa is thus the sister group of hippos. Linnaeus postulated a close relationship between camels and ruminants as early as the mid-1700s. Henri de Blainville recognized the similar anatomy of the limbs of pigs and hippos, and British zoologist Richard Owen coined the term ""even-toed ungulates"" and the"
"dusk to graze on grasses. While hippopotamuses rest near each other in the water, grazing is a solitary activity and hippos are not territorial on land. The hippopotamus is among the most dangerous animals in the world as it is highly aggressive and unpredictable. They are threatened by habitat loss and poaching for their meat and ivory canine teeth. The Latin word ""hippopotamus"" is derived from the ancient Greek , ""hippopotamos"", from , ""hippos"", ""horse"", and , ""potamos"", ""river"", meaning ""horse of the river"". In English, the plural is ""hippopotamuses"", but ""hippopotami"" is also used; ""hippos"" can be used as"
"for various purposes. In the Western world, some snakes (especially docile species such as the ball python and corn snake) are kept as pets. Reptile Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives. The study of these traditional reptile orders, historically combined with that of modern amphibians, is called herpetology. Because some reptiles are more closely related to birds than they are to other reptiles (e.g., crocodiles are more closely related to birds than they are to lizards), the traditional groups of ""reptiles"" listed above do not together"