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Which came first, the chicken or the egg?

Eggs come from chickens and chickens come from eggs: that’s the basis of this ancient riddle. But eggs – which are just female sex cells – 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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Which came first, the chicken or the egg?
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    Which came first, the chicken or the egg?

    Which came first, the chicken or the egg?

    Eggs come from chickens and chickens come from eggs: that’s the basis of this ancient riddle. But eggs – which are just female sex cells – evolved …

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