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Harmless 4 year s ago
The expression "rare as a hen's tooth" comes from the fact that chicks in the egg have what is known as an "egg tooth" on their beak which helps them break out of the shell. They lose it almost immediately after hatching. Hence the expression.
MISCONCEPTION: TYRANNOSAURUS REX HAD BAD VISION
Recently researchers at the University of Oregon determined that the T. rex may have had better depth perception than present-day hawks and eagles.
