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Leaf cutting ant of Central America. These ants are the primary herbivores of tropical areas. Ant is shown carrying a leaf on a branch.

Photograph is in the public domain

Bird of paradise plant on a black background.

Photograph is in the public domain

A US Navy attack submarine called The USS Annapolis SSN 760 is submerged in the Arctic Ocean after surfacing through three feet of ice during ice exercise.

Photograph is in the public domain

Skull and neck vertebrae of an Allosaurus Fragilis dinosaur late jurrassic approximately 150 million years ago.

Photograph is in the public domain

Picture of two dolphins jumping out of the water.

Photograph is in the public domain

Rodney Stone champion Bulldog.

Photograph is in the public domain

Colorful green, blue, yellow and orange tree frog with red eyes. Frog is sitting on a leaf.

Photograph is in the public domain

Closeup picture of a white Umbrella cockatoo pet bird.

Photograph is in the public domain

Bengal tiger walking with a baby cub.

Photograph is in the public domain

Apache Native American Indian wigwam hut made out of straw. Has pottery and other Indian artifacts outside.

Photography by Edward S. Curtis and is in the public domain