quill

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President Richard M. Nixon smiles and gives the victory sign as he boards the White House helicopter after his resignation on August 9, 1974 in Washington, D.C.

Timeline of the 1970s

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Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays

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Nostradamus and His Prophecies

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10 Failed Doomsday Predictions

Horses. Equus caballus. Horse stable. A brown horse looks out from his stall through the window.

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quill

in mammals

Learn about this topic in these articles:

porcupine

In hair
…of the porcupine are called quills and serve defensive purposes.
Read More
In integument: Hair
…the structure of the porcupine’s quills.
Read More