Which came first, the chicken or the egg?

Eggs evolved more than a billion years ago, whereas chickens have been around for just 10,000 years. So the riddle is easily solved…or is it?

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What Came First, The Chicken Or The Egg? A Conundrum in Rhyme for Children of all Ages: A fun conundrum for kids in rhyme: 9781739338206: Stevens Publishing, Perry: Books