Irish Elk

This majestic Ice Age deer roamed all the way from Ireland to Africa to Asia. One of the largest of its kind ever to walk the Earth, this regal creature stood 6.9 feet tall at the shoulder and had massive 12-foot-wide antlers.


Passenger Pigeon

Billions of passenger pigeons once flew over North America in flocks so large that they actually blocked out the sunlight. Rampant hunting by humans and loss of habitat brought the bird to extinction by 1914.

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