A balancing rock, also called balanced rock or precarious boulder, is a naturally occurring geological formation featuring a large rock or boulder, sometimes of substantial size, resting on other rocks, bedrock, or on glacial till. Some formations known by this name only appear to be balancing, but are in fact firmly connected to a base rock by a pedestal or stem.

No single scientific definition of the term exists, and it has been applied to a variety of rock features that fall into one of four general categories: - A glacial erratic is a boulder that was transported and deposited by glaciers or ice rafts to a resting place on soil, on bedrock, or on other boulders. It usually has a different lithology from the other rocks around it. Not all glacial erratics are balancing rocks; some are firmly seated on the ground. Some balancing erratics have come to be known as rocking stones, also known as logan rocks, logan stones, or logans, because they are so finely balanced that the application of just a small force may cause them to rock or sway. A good example of a rocking stone is the Logan Rock in Cornwall, England, United Kingdom; another is the Trembling Rock in Brittany, France. - A perched block, also known as a perched boulder or perched rock, is a large, detached rock fragment that most commonly was transported and deposited by a glacier to a resting place on glacial till, often on the side of a hill or slope. Some perched blocks were not produced by glacial action, but were the aftermath of a rock fall, landslide, or avalanche.

An erosional remnant is a persisting rock formation that remains after extensive wind, water, and/or chemical erosion. To the untrained eye, it may appear to be visually like a glacial erratic, but instead of being transported and deposited, it was carved from the local bedrock. Many good examples of erosional remnants are seen in Karlu Karlu/Devils Marbles Conservation Reserve in the Northern Territory of Australia. - A pedestal rock, also known as a rock pedestal or mushroom rock, is not a true balancing rock, but is a single continuous rock form with a very small base leading up to a much larger crown. Some of these formations are called balancing rocks because of their appearance. The undercut base was attributed for many years to simple wind abrasion, but is now believed to result from a combination of wind and enhanced chemical weathering at the base where moisture would be retained longest. Some pedestal rocks sitting on taller spire formations are known as hoodoos.

A climbing wall is an artificially constructed wall with grips for hands and feet, usually used for indoor climbing, but sometimes located outdoors. Some are brick or wooden constructions, but on most modern walls, the material most often used is a thick multiplex board with holes drilled into it.

Recently, manufactured steel and aluminum have also been used. The wall may have places to attach belay ropes, but may also be used to practise lead climbing or bouldering. Each hole contains a specially formed t-nut to allow modular climbing holds to be screwed onto the wall. With manufactured steel or aluminum walls, an engineered industrial fastener is used to secure climbing holds. The face of the multiplex board climbing surface is covered with textured products including concrete and paint or polyurethane loaded with sand. In addition to the textured surface and hand holds, the wall may contain surface structures such as indentions (incuts) and protrusions (bulges), or take the form of an overhang, underhang or crack. Some grips are formed to mimic the conditions of outdoor rock, including some that are oversized and can have other grips bolted onto them.

Games played with curved sticks and a ball can be found in the histories of many cultures. In Egypt, 4000-year-old carvings feature teams with sticks and a projectile, hurling dates to before 1272 BC in Ireland, and there is a depiction from approximately 600 BC in Ancient Greece, where the game may have been called kerētízein or because it was played with a horn or horn-like stick. In Inner Mongolia, the Daur people have been playing beikou, a game similar to modern field hockey, for about 1,000 years.

Most evidence of hockey-like games during the Middle Ages is found in legislation concerning sports and games. The Galway Statute enacted in Ireland in 1527 banned certain types of ball games, including games using "hooked" (written "hockie", similar to "hooky") sticks. By the 19th century, the various forms and divisions of historic games began to differentiate and coalesce into the individual sports defined today. Organizations dedicated to the codification of rules and regulations began to form, and national and international bodies sprang up to manage domestic and international competition.

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquet lobortis purus non tempor. Morbi in augue faucibus, posuere nisi in, tincidunt ante. Nullam varius velit et nisi laoreet, eget rhoncus nibh condimentum. Pellentesque ultricies pulvinar lorem, ac euismod nibh dictum non. Maecenas vulputate justo vel libero imperdiet, vitae porta orci cursus. Interdum et malesuada fames ac ante ipsum primis in faucibus. Nulla lacinia dolor id dapibus commodo. Donec semper non risus volutpat volutpat. Curabitur auctor nec mi eget fringilla. Praesent quis mauris enim. Mauris in enim ut urna varius consectetur vel in ipsum. Sed a sem quis risus ultrices bibendum quis non est. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia curae; Nam pharetra vestibulum massa in facilisis. Ut tellus dolor, pulvinar eget tempus quis, tempus non nulla.

Integer vitae egestas lacus. Maecenas imperdiet vel arcu a bibendum. Praesent ut turpis condimentum, convallis felis quis, porta justo. Etiam molestie pharetra iaculis. Nam malesuada odio finibus imperdiet ultrices. Quisque laoreet tempor commodo. Nullam eu tincidunt quam. Ut ut lacus ipsum. Maecenas justo sapien, dictum at neque et, facilisis pretium dui. Suspendisse vitae mollis mi, bibendum mollis ex. Aenean a lectus ipsum.

Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Fusce eget faucibus elit. Pellentesque ornare a turpis in pulvinar. Quisque id mauris libero. Cras a est in enim sollicitudin ornare. Nam a feugiat nisl. Nullam eget velit facilisis, egestas leo tempor, suscipit magna. Etiam eleifend, ipsum vitae accumsan pharetra, nibh ante accumsan justo, vel tincidunt ligula dui eget ipsum. Fusce ut purus suscipit, dapibus tellus ac, interdum dolor. Vestibulum molestie egestas sapien a pulvinar. Maecenas pretium, turpis non pharetra cursus, ipsum mauris eleifend nulla, in semper elit nulla ut lectus. Vivamus vel consectetur felis. Vivamus laoreet orci nec tincidunt ullamcorper.

Donec interdum justo nec tortor rutrum aliquam. Aenean placerat venenatis vestibulum. Suspendisse vel dolor id lacus tincidunt imperdiet ac eget metus. Nam ullamcorper aliquet dui laoreet eleifend. In hac habitasse platea dictumst. Suspendisse auctor vitae erat ut posuere. Mauris eu neque suscipit, facilisis metus at, tincidunt tellus. Proin ut leo vel urna elementum aliquam ut id tortor.

Nullam at porta risus. Curabitur sollicitudin vestibulum nibh eget ullamcorper. Pellentesque sit amet dui id eros condimentum interdum in ac ex. Pellentesque elit libero, convallis a blandit eu, hendrerit nec velit. Nam pulvinar nunc odio. Sed sed pellentesque mauris. Curabitur viverra est eu vestibulum scelerisque. In hac habitasse platea dictumst. Sed malesuada, massa vel eleifend convallis, urna neque dapibus orci, nec bibendum erat odio ut magna. Pellentesque vel quam sit amet felis euismod varius.