| For 35 years, the 
				huge skeleton cast, 4.25 metres (14 ft) high and 21 metres long, 
				has been the first sight visitors see when they enter the London 
				museum's main entrance.
 On Thursday, a team begins the three-week process of dismantling 
				Dippy before conservators spend 12 months preparing the delicate 
				plaster-of-Paris cast for the journey around Britain where it 
				will go on show at eight locations from 2018 until 2020.
 
 From the end of 2020, a bronze cast of Dippy will then go on 
				display outside the museum.
 
 Scottish-born American industrialist Andrew Carnegie originally 
				presented the 292-bone cast to the museum in 1905, and it has 
				held its prominent position in the main entrance hall since 
				1979.
 
 Dippy will be replaced by a 25.2 metre real skeleton of a blue 
				whale as part of a major overhaul.
 
 Diplodocus was first described as a new type of dinosaur in 1878 
				by Professor Othniel C. Marsh at Yale University. The herbivore 
				species lived sometime between 156 and 145 million years ago and 
				belongs to a group called sauropods, meaning 'lizard feet'.
 
 (Removes extraneous word in intro)
 
 (Reporting by Michael Holden; editing by Stephen Addison)
 
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