A cave or cavern is a natural underground space large enough for a human to enter. Caves form naturally by the weathering of rock and they often extend deep underground. The word "cave" can also refer to much smaller openings such as sea caves, rock shelters, and grottos.
Speleology is the science of exploration and study of all aspects of caves and the environment that surrounds the caves. Exploring a cave for recreation or science may be called caving, potholing, or, in Canada and the United States, spelunking (see caving).
Famous quotes containing the word cave:
“The human mind is indeed a cave swarming with strange forms of life, most of them unconscious and unilluminated. Unless we can understand something as to how the motives that issue from this obscurity are generated, we can hardly hope to foresee or control them.”
—Charles Horton Cooley (18641929)
“Nothing is uglier than the sinner, nothing so leprous or fetid; the scar of his crimes is still raw, and he stinks like the cave of Hell.”
—Aurelius Clemens Prudentius (c. 348405)
“What difference is there, do you think, between those in Platos cave who can only marvel at the shadows and images of various objects, provided they are content and dont know what they miss, and the philosopher who has emerged from the cave and sees the real things?”
—Desiderius Erasmus (c. 14661536)