Did The Egg Come First or The Chicken? Scientists Have Solved The Mystery:
The age-old question of whether the chicken or the egg came first has captivated people worldwide, but scientists claim to have finally found an answer to this puzzling dilemma.
According to reports in Arab media, researchers at the University of Bristol have made a significant discovery regarding the ancestors of birds and vocal animals. Their study, published in the scientific journal ‘Nature Ecology and Evolution,’ suggests that these ancestors gave birth to offspring instead of laying eggs.
The research highlights the distinctiveness of the amniotic egg compared to the amniotic eggs found in amphibians. It possesses a reduced eggshell and additional embryonic membranes, including the amnion, chorion, and allantois, along with an external shell.
The study, conducted by the School of Earth Sciences at the University of Bristol, examined 51 fossil species and 29 living species of oviparous animals, which either lay hard or soft-shelled eggs or give birth to live young.
The findings reveal that memlids, a type of amino acid, have long-term effects on supporting embryo development within the animals’ bodies. While hard-shelled eggs have traditionally considered a remarkable evolutionary adaptation, this research suggests that the prolonged expansion of the embryo played a definitive role in protecting this group of animals.
Scientists argue that the eggshell comprised of a specific protein unique to chickens, suggesting that the egg originated as a result of the chicken’s existence. Consequently, it inferred that the chicken came first, and subsequent generations were produced from eggs.
Professor Michael Benton from the University of Bristol expressed, “Our work, along with that of other researchers in recent years, has challenged the traditional notion of a reptile egg found in textbooks. We have moved away from considering shorter or longer periods of embryo development inside the mother, as observed in immunity, and instead expanded it until the conditions were favorable for delayed hatching.”