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Filling up an entire room at the Royal Tyrrell Museum in Drumheller, Canada, is the world's largest marine reptile, Shonisaurus sikanniensis. This exhibit is also a special tribute to former Royal Tyrrell Curator of Marine Reptiles, Dr. Elizabeth (Betsy) Nicholls.
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This massive ichthyosaur was discovered in the early 1990s along the bank of the Sikanni Chief River in northeastern British Columbia. Sscientists were deterred from excavating the specimen due to its size, (the creature measured a spectacular 21 metres in length) and remote location. However, Dr. Nicholls and her crew recognized its scientific value and vulnerability (there was a high risk of damage due to submersion) and embraced the challenge. It took three field sessions (1999-2001) to excavate this "Triassic Giant" from its remote resting place.
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Measuring 21 metres in length, this ichthyosaur dates back to the Triassic, over 220 million years ago. Dr. Nicholls' research concluded that it was 30% larger than its nearest relative, and was indeed the world's largest-known marine reptile. Lacking teeth, they also determined it was the earliest-known example of a giant filter-feeding vertebrate.
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Dr. Elizabeth (Betsy) Nicholls was recognized for her work on this project when she won the Rolex Award for Enterprise in 2000. The prize provided the financial support necessary to complete the preparation of the specimen and garnered global recognition for the project. Nicholls passed away in 2004 after losing a hard-fought battle with cancer. This incredible creature is her legacy.
The @natural_history_museum in London is home to some of the most complete fossils of prehistoric sea animals, including ichthyosaurs and plesiosaurs, some of which were discovered by palaeontologist Mary Anning and her brother in the early 1800s. This massive wall also contains Jurassic crocodiles that lived in the sea, fossils that inspired stories of sea dragons, a female ichthyosaur fossil with evidence of six unborn young in her womb, and another specimen that died and was preserved in the process of giving birth.
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