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The 1973 Mount Gambier cave diving accident was a scuba diving incident on 28 May 1973 at a flooded sinkhole known as "The Shaft" near Mount Gambier in South Australia.The incident claimed the lives of four recreational scuba divers: siblings Stephen and Christine M. Millott, Gordon G. Roberts, and John H. Bockerman. [1]
In Cusco, Peru. Giant hummingbirds can be identified by their large size and characteristics such as the presence of an eye-ring, straight bill longer than the head, dull colouration, very long wings (approaching the tail tip when stowed), long and moderately forked tail, [11] tarsi feathered to the toes and large, sturdy feet.
The henge enclosure is the type site for the Mount Pleasant Period of the later Neolithic. A study of the 'mega henge' has concluded that its construction was under way in around 2,500 BC, and it was built in between 35 and 125 years, not over centuries as had previously been thought. [3]
A drum hoist (steel wire rope visible) and motor. In underground mining a hoist or winder [1] is used to raise and lower conveyances within the mine shaft.Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (), although modern large hoists use alternating current drives that ...
The ruby-throated hummingbird (Archilochus colubris) is a species of hummingbird that generally spends the winter in Central America, Mexico, and Florida, and migrates to Canada and other parts of Eastern North America for the summer to breed.
The sword-billed hummingbird was first described as Ornismya ensifera by Auguste Boissonneau in 1839 on the basis of specimens from Santa Fé, Bogotá, Colombia. [3] It was moved to the genus Ensifera in 1843 by René Lesson. [4]