A cave, or cavern is an opening of some size in the solid crust of the earth beneath the surface. Caves are principally met with in limestone rocks, sometimes in sandstone and in volcanic rocks. Some of them have a very grand or picturesque appearance, such as Fingal's Cave in Staffordshire, others, such as the Mammoth Cave of Kentucky, which incloses an extent of about 40 miles of subterranean windings, are celebrated for their great size and subterranean waters, others for their gorgeous stalactites and stalagmites; others are of interest to the geologist and archaeologist from the occurrence in them of osseous remains of animals no longer found in the same region, perhaps altogether extinct, or for the evidence their clay floors and rudely-sculptured walls, and the prehistoric implements and human bones found in them, offer of the presence of early man.
Caves in which the bones of extinct animals are found owe their origin, for the most part, to the action of rain-water on limestone rocks. The deposit contained in them usually consists of clay, sand, and gravel combined. In this are embedded the animal remains, and stones either angular or rounded. Some of the remains found in European caverns belong to animals now found only in the tropical or subtropical regions, and others are the remains of animals now living in more northerly areas; others, again, are the relics of extinct animals. Among the latter class of animals are the cave bear and lion, the mammoth and mastodon, species of rhinoceros, etc. Of others that have only migrated may be mentioned the reindeer, which is no longer found in Southern Europe; and the Hyoena crocuta, found in the Gibraltar caves, which now lives in South Africa. The ibex, the chamois, and a species of ground squirrel, are shown to have once lived in the Dordogne, but are now found only on the heights of the Alps and Pyrenees.
Thus it is evident that the geographical conditions of the country must have been very different from what they are now. Man's relation to these extinct animals, and his existence at the time these changes took place, are demonstrated by such discoveries as those of human bones and worked flints beneath layers of hyena droppings, as in Wokey's Hole, near Wells, England; mixed up indiscriminately, as in Kent's Hole, near Torquay, with bones of elephant, rhinoceros, hyena, etc; and by the fact that many bones of the extinct animals are split up, evidently for the sake of the marrow.
In the Dordogne and Savigne caves fragments of horn have been found bearing carved, or rather deeply scratched, outline figures of ibex, reindeer, and mammoth. Among the most remarkable bone-caves are those of Kirkdale, in Yorkshire; Kent's Hole, Wokey's Hole; of Franconia, in Bavaria; the banks of the Meuse, near Liege; and the south of France. Research Cave
A collective noun (or collective name) is a name which denotes or represents a number of individual items. For example, a number of sheep together is known as a 'flock'. The word 'flock' is the collective noun for a number of sheep. Some items have multiple collective nouns, for example a collection of goats can be known as a 'herd', a 'tribe' or a 'trip'.
Ambush is the collective noun for a group of tigers.
Army is the collective noun for a group of frogs, ants,
Array is the collective noun for a group of hedgehogs.
Badelynge is the collective noun for a group of ducks on the ground.
Bale is the collective noun for a group of turtles.
Barren is the collective noun for a group of mules.
Basket is the collective noun for a group of plums.
Battery is the collective noun for a group of barracuda.
Bazaar is the collective noun for a group of guillemots.
Bed is the collective noun for a group of clams.
Bench is the collective noun for a group of bishops, magistrates.
Bevy is the collective noun for a group of quail, roes, swans, pheasants, ladies.
Brace is the collective noun for a group of bucks.
Brood is the collective noun for a group of chickens.
Building is the collective noun for a group of rooks.
Bunch is the collective noun for a group of grapes, flowers.
Bundle is the collective noun for a group of asparagus.
Business is the collective noun for a group of ferrets.
Caravan is the collective noun for a group of camels.
Cast is the collective noun for a group of hawks, falcons.
Cete is the collective noun for a group of badgers.
Charm is the collective noun for a group of goldfinches.
Chatter is the collective noun for a group of budgerigars.
Chattering is the collective noun for a group of choughs.
Chine is the collective noun for a group of polecats.
Clamour is the collective noun for a group of rooks.
Clous is the collective noun for a group of gnats.
Clowder is the collective noun for a group of cats.
Clump is the collective noun for a group of trees.
Cluster is the collective noun for a group of grapes, spiders.
Clutch is the collective noun for a group of eggs.
Clutter is the collective noun for a group of spiders.
Colony is the collective noun for a group of gulls, frogs, penguins, ants, beavers.
Company is the collective noun for a group of widgeon, parrots.
Congregation is the collective noun for a group of plovers.
Convocation is the collective noun for a group of eagles.
Covert is the collective noun for a group of coots.
Covey is the collective noun for a group of partridges, grouse.
Crash is the collective noun for a group of rhinoceros.
Horn is a general term applied to all hard and pointed appendages of the head, as in deer, cattle, etc, but as a term denoting a particular kind of substance nothing should be called horn which is not derived from the epidermis or outer, layer of the integument, whether on the trunk, hoofs, or head.
Horn is a tough, flexible, semi-transparent substance, most liberally developed in the horns of bovine animals, but also found in connection with the 'shell' of the tortoise, the nails, claws, and hoofs of animals, the beak of bird and turtle, etc
Horn is softened very completely by heat, so as to become readily flexible, and to adhere to other pieces similarly softened. True horn consists principally of an albuminoid principle, keratin, with a small portion of gelatine and a little phosphate of lime. In some species of animals the males only have horns, as for instance the stag. In cattle both male and female have horns, though there are also hornless cattle.
Horns differ widely in the case of different animals. Thus the horns of deer consist of bone, and are deciduous; those of the giraffe are independent bones, with a covering of hairy skin; those of oxen, sheep, and antelopes consist of a bony core covered by a horny sheath. The horns of the rhinoceros alone consist exclusively of horny matter. The horns of oxen, sheep, goats, and antelopes are never shed, except in the case of the prong-horned antelope. The number never normally exceeds four, and in the case of deer the horns are branched.
The various kinds of horns were formerly employed for many purposes. The principal formerly used in the arts are those of the ox, buffalo, sheep, and goat. Deer horns were almost exclusively employed for the handles of knives and of sticks and umbrellas. Those which furnish true horn can be softened by heat (usually in boiling water), cut into sheets of various thickness, which sheets may be soldered or welded together at the edges so as to form plates of large dimensions, and were formerly polished and dyed so as to imitate the much more expensive tortoise-shell. The clippings of horn may be welded together in the same manner, and were formerly made into snuff-boxes, powder horns, handles for umbrellas, knives, forks, etc. As horn has the valuable property of taking on and retaining a sharp impression from a die, many highly ornamental articles were also turned out. Combs for the hair were made from the flattened sheets, and out of the solid parts of buffalo horns beautiful carvings were made. Research Horn
Centrosaurus was a dinosaur of the Cretaceous period. Centrosaurus was about six metres long and is thought to have weighed about 2.6 tons, walking on all-fours. Centrosaurus was a herbivore with a large, heavy head, strong shoulders, stout legs and a short tail. It had a long nose armed with a horn, similar to a modern rhinoceros, and a defensive neck frill. Remains of Centrosaurus have been found in Alberta, Canada. Research Centrosaurus
The Hornbills (Bucerotidoe) are a remarkable group of birds found in southern Asia and Africa. They are akin to the Toucans and Kingfishers. The hornbills are remarkable for the size of their bill and a horny protuberance which surmounts the bill.The rhinoceros hornbill (Buceros rhinoceros) is almost the size of a turkey, of a black colour, except on the lower part of the belly and tip of the tail, which are white. It has a sharp-pointed, slightly-curved bill, about 25 cm long, and furnished at the base of the upper mandible with an immense appendage in the form of an inverted horn. The skeleton though bulky is very light, being permeated with air to an unusual degree. During incubation the female is plastered up in the hollow of a tree and fed by the male through a small aperture left for the purpose. The hornbills are of arboreal habit, and feed on fruits; but in captivity they take small reptiles, and the Abyssinian species even attacks snakes. Research Hornbills
The hyrax is a genus of pachydermatous mammalia, intermediate in their character between the rhinoceros and the tapir. It is the only genus of the order Hyracoidea, characterized by having no canine teeth, but long curved incisors. The front feet have four toes, and the hind feet three. The Cape hyrax was called by the colonists of South Africa the Rock-badger or Rock--rabbit. Research Hyrax
 
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