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Which Came First, The Chicken Or The Egg? Scientists Finally Have The Answer
AOL.com • • science
Key Points:
- The question of whether the chicken or the egg came first, long debated by philosophers and scientists, is clarified by evolutionary research showing eggs existed millions of years before chickens.
- Egg-laying animals appeared around 540 million years ago, predating birds and specifically chickens by a vast margin.
- The first true chicken emerged from an egg laid by two birds that were not quite chickens, with genetic mutations during domestication leading to the modern chicken over thousands of years.
- Eggs as a biological structure evolved much earlier, being laid by reptiles, dinosaurs, and fish, and their molecular systems trace back to primitive organisms predating complex animals.
- Evolutionary biology reframes the riddle, emphasizing gradual processes over clear beginnings, concluding that the egg came first as a protective vessel for new life long before chickens existed.
