Was the Chicken or the Egg First? - Scientists Unravel Age-Old Mystery with 80 Species Study
They studied a total of 51 fossil and 29 living species that were either egg-laying or viviparous (give birth to live young).
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How Do Fish Reproduce?
Fish reproduce through external or internal fertilization in three main ways, including oviparous (laying eggs), viviparous (giving birth to live young), and ovoviviparous (eggs hatch inside the ...