AnimalsBirds
An owl's eyes are tubes locked into its skull.
It cannot move them at all, so it evolved a neck that swivels 270 degrees.
Source
This fact is written from the English Wikipedia article it links to, so you can check every word in one tap. Fact Drop rates that source 4 out of 5 for credibility, and the rating travels with the fact on the back of its card in the app.
Why it sounds fake
What most people think
Eyes are balls that roll in their sockets, and an owl turns its head all the way round.
What is actually true
The eyes are tubes that cannot move at all, and the famous neck exists to make up for them.
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