Whales abandoned essential biological tools when they returned to the ocean millions of years ago.
In short: When cetacean ancestors transitioned back to marine life, they shed specific genetic functions that seem vital for survival. This video explores the evolutionary trade-offs whales made during their return to the water.
Approximately 50 million years ago, the ancestors of modern whales began their evolutionary journey back into the sea. This transition required significant physiological shifts, resulting in the loss of certain gene functions that would typically be considered indispensable for land-dwelling mammals.
By examining these genetic changes, researchers can better understand the extreme adaptations required for life in the ocean. The loss of these specific genetic capabilities highlights the radical transformation cetaceans underwent to thrive in a fully aquatic environment.
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Sources
- Summary by Intellect · source: Weird Things Whales Lost on Their Journey to the Sea
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