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thefirst animal extinct was the euridan fauna and it came from the time of pre cambrian. it is believed to have lived before the dinosaurs and was also known to be a plant

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13y ago
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15y ago

There are many folkloristic legends about it, however,the dinosaur Amphicoelias fragillimus is said to be the biggest prehistoric animal.

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14y ago

I believe the biggest extinct animal is dinosaurs.

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13y ago

The tallest and heaviest dinosaur known from a complete skeleton is the Brachiosaurus. That is all I know from knowledge. Sorry I wasn't much of a help.

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11y ago

It was Argentinosaurus, 36 meters long, it was even larger than the what is now, the Blue whale. Not only that. It weighed more.

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Q: What is the world's largest extinct animal?
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