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dark matter
(Encyclopedia)dark matter, material that is believed to make up nearly 27% of the mass of the universe but is not readily visible because it neither emits nor reflects electromagnetic radiation, such as light or ra...zebra
(Encyclopedia)zebra, herbivorous hoofed African mammal of the genus Equus, which also includes the horse and the ass. It is distinguished by its striking pattern of black or dark brown stripes alternating with whit...Percheron horse
(Encyclopedia)Percheron horse pûrˈchərŏnˌ [key], breed of draft horse developed in NW France, originally of Flemish origin, but also containing some Arabian blood (see Arabian horse). For a heavy horse, it has...tapir
(Encyclopedia)tapir tāˈpər [key], nocturnal, herbivorous mammal, genus Tapirus, of the jungles of Central and South America and SE Asia. The tapir is somewhat piglike in appearance; however, it is not related to...Four Horsemen of the Apocalypse
(Encyclopedia)Four Horsemen of the Apocalypse əpŏkˈəlĭps [key], allegorical figures in the Book of Revelation in the Bible. The rider on the white horse has many interpretations—one is that he represents Chr...horse
(Encyclopedia) CE5 General anatomy of a horse horse, hoofed, herbivorous mammal now represented by a single extant genus, Equus. The term horse commonly refers only to the domestic Equus caballus and to the wild...Thoroughbred horse
(Encyclopedia)Thoroughbred horse, breed of light horse more properly known as the English running horse. As its name implies, it was the first pedigreed, or “thoroughbred” horse. It originated in England from c...Justin Morgan
(Encyclopedia)Justin Morgan, 1792–1821, American horse, the foundation sire of the Justin Morgan breed of horses. Originally called “Figure,” the stallion was renamed for his first owner, Justin Morgan (1747...Arabian horse
(Encyclopedia)Arabian horse, breed of light horse developed in Mesopotamia and N Africa, and probably the first true domesticated breed. Prized since earliest times for its superior beauty, spirit, speed, grace of ...quarter horse
(Encyclopedia)quarter horse, American breed of light horse that originated during the colonial era, partly from Arabian ancestry (see Arabian horse). The name refers to the horse's reputation for speed at the quart...Browse by Subject
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