Why do some animals lay eggs, and others give live birth?
Quirks & Quarks Share on Facebook Share on Twitter Share by Email The egg came first – the chicken, and live births, came way later Posted: February 28, 2020 Chicks at a hatchery (CBC / Radio-Canada 2015) Show more The answer is it depends on the energetic output required for eggs or live birth 2:12 […]
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