A juvenile allosaurus nicknamed "Young Al" is only the second specimen of its type ever discovered.
A juvenile allosaurus nicknamed "Young Al" is only the second specimen of its type ever discovered.
Rob Stothard/Getty Images Europe/Getty Images
Another view of the dinosaur's remains, which are 150 -- 155 million years old. <br />
Another view of the dinosaur's remains, which are 150 -- 155 million years old.
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An elephant bird egg -- one of the biggest bird eggs in history -- will also be auctioned.
An elephant bird egg -- one of the biggest bird eggs in history -- will also be auctioned.
A large giraffe skull dating from the early 20th century.
A large giraffe skull dating from the early 20th century.
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The head of a full crocodile also goes under the hammer.
The head of a full crocodile also goes under the hammer.
Rob Stothard/Getty Images Europe/Getty Images
This woolly rhino skull (caementodon tongzinensis) measures just under two feet long and was found in China. It is up to 20 million years old.
This woolly rhino skull (caementodon tongzinensis) measures just under two feet long and was found in China. It is up to 20 million years old.
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A stegosaurus tail spike, also found in Wyoming and just over one foot long.
A stegosaurus tail spike, also found in Wyoming and just over one foot long.
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An Ice Age cave bear from the Carpathian mountains in Romania and around eight feet high.
An Ice Age cave bear from the Carpathian mountains in Romania and around eight feet high.
Rob Stothard/Getty Images Europe/Getty Images
A rare pliosaur (Liopleurodon ferox) skull. Pilosaurs were swimming reptiles which were distantly related to modern turtles.
A rare pliosaur (Liopleurodon ferox) skull. Pilosaurs were swimming reptiles which were distantly related to modern turtles.
A skeleton of a Moa is also on sale. The now extinct flightless birds were native to New Zealand.
A skeleton of a Moa is also on sale. The now extinct flightless birds were native to New Zealand.
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A large rare spiny ammonite group.
A large rare spiny ammonite group.
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A rare penguin fossil weas found in South America and believed to date from the Miocene, around 20 million years ago.
A rare penguin fossil weas found in South America and believed to date from the Miocene, around 20 million years ago.
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