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"Baby Boomers will remember Oliver Butterworth's 1956 book The Enormous Egg, in which a chicken lays an anomalously large egg from which hatches a triceratops. (If you don't remember the book, perhaps you remember the 1968 TV special based on it.)"
And republished in the late 1980s. (Public library had a shiny new copy.) It had illustrations. Poor mama chicken.
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