Dippy: why is the Natural History Museum hiding its diplodocus?

News that the diplodocus skeleton which has graced the great hall of the Natural History Museum for three decades is to be replaced with a blue whale has been met with a wave of indignation and sadness on social media. So why has the museum decided to remove the iconic dinosaur?

What is the skeleton's origin?

The diplodocus skeleton that has stood in Hintze Hall for 35 years, affectionately known as "Dippy", is made up not of actual fossilised bones, but plaster casts from an original skeleton that was unearthed at the turn of the 20th century.

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In about 1905, King Edward VII requested a copy of the original skeleton, housed in the Carnegie Museum in the US, after seeing a picture of it. Businessman Andrew Carnegie agreed and donated a complete replica, which went on display in the Natural History Museum's dinosaur hall. In 1979, Dippy took centre stage, and was placed in the Museum's main Hall.

Why is Dippy being removed?

The diplodocus is being removed to make way for the museum's blue whale skeleton. The museum believes that the whale skeleton will help in the presentation of its "three great narratives", the BBC reports.

These cover the evolution of life on earth, the diversity of life on the planet today, and the manner in which humans interact with the planet.

"Everyone loves 'Dippy', but it's just a copy," said Sir Michael Dixon, the Natural History Museum's director. "What makes this museum special is that we have real objects from the natural world – over 80 million of them – and they enable our scientists and thousands like them from around the world to do real research."

How has the public reacted to the news?

News of the skeleton's removal quickly drove "Dippy" to the top of Twitter trends. Hundreds of the social media network's users tweeted their sadness over the decision to remove the iconic dinosaur skeleton.

Several users suggested that the move was little more than a cheap PR stunt.

Others attempted to understand the museum's decision.

Some began using the hashtag #savedippy to try to get the decision reversed.

How did the museum respond?

Dixon acknowledged that some visitors disagreed with the move, but said that the change came as part of an important shift in the museum's emphasis.

"Although many people think of [the diplodocus] as a fixture in the main hall, for most of its time it has been in another gallery," he said. "It makes more sense to put him in a hall with other dinosaurs."