​ Jackson, a dog, was always trying to teach Rex, a puppy, something new,

One day Rex said, "I heard all birds have specialized tail feathers that help with flight. These feathers are called pinions."

Jackson responded, "Yes, if you look closely you can tell that ravens have four of these feathers while crows only have three." 

"What's the difference", asked Rex.

Jackson replied, "The difference is just a matter of a pinion." 

:  )

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