Skip navigation

The NaturePlus Forums will be offline from mid August 2018. The content has been saved and it will always be possible to see and refer to archived posts, but not to post new items. This decision has been made in light of technical problems with the forum, which cannot be fixed or upgraded.

We'd like to take this opportunity to thank everyone who has contributed to the very great success of the forums and to the community spirit there. We plan to create new community features and services in the future so please watch this space for developments in this area. In the meantime if you have any questions then please email:

Fossil enquiries:
Life Sciences & Mineralogy enquiries:
Commercial enquiries:

Behind the scenes

2 Posts tagged with the research tag

Seeing double Dippy

Posted by Amy Freeborn Oct 15, 2014

On a little trip to Paris recently I met Dippy's identical twin.


Our iconic Diplodocus in Hintze Hall, affectionately known as Dippy, is actually a cast taken from the type specimen of Diplodocus carnegii, which was unearthed in Wyoming, USA in 1898.


The original fossil stands in the Carnegie Museum of Natural History in Pittsburgh. But there are said to be at least 10 replicas dotted around the world. One lives here with us. And another resides in Paris at the National Museum of Natural History in its Gallery of Palaeontology.



Our Diplodocus, left; and the Paris Diplodocus, right. The resemblance is uncanny.


However, on closer inspection at the Muséum National d'Histoire Naturelle de Paris, I realised that Dippy's French sibling wasn't so identical after all.


You may recall from my previous blog that when the original and casts were (re)constructed, their tails rested on the ground. However, advances in scientific understanding led to a determination that Diplodocus did not drag their tails, but held them aloft and used them as whip-like weapons. So in 1993 we repositioned our Dippy's tail to curve over visitors' heads, as you know it today.



A 1905 illustration of the original Diplodocus carnegii, which was described by John Bell Hatcher in 1901, and reconstructed by Hatcher and William Holland.


The Paris Diplodocus in original tail-dragging pose.



Our Dippy's graceful tail, which extends nine feet above the ground.


Of course it's not surprising that the Paris Diplodocus retains its historic pose. Repositioning a dinosaur's tail is no simple task. Our repositioning operation took several months to complete and involved the old tail being dismantled and the plaster of Paris vertebrae moulded and re-cast in hollow fibreglass. This ensured the tail was light enough to be mounted in an elevated position, and could accommodate a supporting strut inside it.



While the re-casting was being performed, Dippy was given a temporary cardboard tail.


But what about the other Diplodocus casts around the world? And the original fossil in Pittsburgh, for that matter? Well, I checked in with proto-Dippy and can confirm that its tail is elevated. Plus, I know that the cast at the National Museum of Natural Science in Madrid has been repositioned, as it was two of our conservators who assisted in that operation. And our palaeontologists Angela Milner and Paul Barrett, who visited the cast on display at The La Plata Museum in La Plata, Argentina, report that its tail remains on the ground.


As for the rest, I would love to hear your accounts of Diplodocus cast spotting around the world. Please post your comments and pictures below.


I am what you might describe as curious about the curious. If it's strange or surprising, remarkable or rare, it will pique my interest and usually find a place in my heart.


When I think about the mid-to-late-'teenth centuries, when a steady flow of goods from far-away places began arriving in European ports and populating the drawing rooms of those with a bit of social and cultural cachet, I get a little misty eyed.


Oh, to have had my own curiosity cabinet, filled with fossils and minerals and taxidermied creatures; my own window through which to experience exotic lands, and a reflection of my good taste and wealth...



Cabinet of Curiosities, an oil painting by Domenico Remps (1620–1699) *swoon*.


But these cabinets weren't purely vanity projects. As scientific thought blossomed, the desire to possess items grew into a desire to understand them. Curiosity cabinets developed into natural history collections, and went on to form the future model, and in some cases, the actual contents, of the museums we still visit today.


Sir Hans Sloane's massive private collection of plants, animals, antiquities and curios was the founding core of the British Museum and later the Natural History Museum. And of course Walter Rothschild's personal museum went on to become our Museum at Tring.


At his peak, Rothschild had 300 men working for him in far-flung locations around the world sourcing specimens. Frederick Selous, an African big-game hunter, was responsible for procuring many mammalian specimens for us. (Selous died in WW1 and there is a memorial to him in the Central Hall on the left of the Darwin statue).



A museum staff member photographed in 1932 surrounded by stuffed animals.


But in contrast to our taxidermic tendencies of the past, today the Museum's collecting interests focus on fossils, minerals, insects and plants.


When you consider that beetles make up 25% of all life forms, and that trees have dominated dry land for over 300 million years (far longer than dinosaurs or mammals), there's clearly a lot for us to discover within those fields.



Fossil coral collected by Museum scientists in Indonesia in 2011. The fossils are helping researchers discover why the waters where the Pacific and Indian oceans meet are so rich in biodiversity and may also provide clues to how the area will be affected by climate change


In a recent chat with archivist and records manager Daisy Cunynghame I learned that the perception of the Museum's collections and collecting practices over time has been the source of much intrigue and even urban legend.


Daisy says:

There have been, over the last 100 years or so, a lot of rumours about what we're collecting behind the scenes.


Newspapers used to run stories saying things like we would pay £500 for a blue bottle fly or £50 for a smoked cigarette with its full length of ash still intact. Then we would be inundated with these things.


People have historically thought that we are the place for all these miscellaneous things.



Newspaper clippings from January 1914 claiming Charles de Rothschild paid £1,000 for a rare flea, followed by a denial from Rothschild that he paid any such sum.


But we're not a repository for any old odds and sods. In fact, the Museum is one of the leading natural history institutions in the world and a global leader in scientific research.


Although that's not to say that we don't have a few curious, unusual and not-strictly-scientific specimens lurking around the place.


And it is with that in mind that I am launching a Specimen of the Month series on this blog, to reveal the stories behind some of (what I consider to be) the most fascinating items in our possession. Stay tuned.