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The evolution of the anus may have driven the body plan of all advanced animals, including humans
MattLphotography / Alamy
The anus is a wildly successful innovation, but how did it evolve? A genetic analysis suggests it probably began as an opening used to release sperm that later fused with the gut – an example of evolution repurposing structures.
“Once a hole is there, you can use it for other things,” says Andreas Hejnol at the University of Bergen in Norway.
It is thought that early animals evolved…
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Source link : https://www.newscientist.com/article/2473713-the-anus-may-have-evolved-from-a-hole-originally-used-to-release-sperm/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
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Publish date : 2025-03-28 13:00:00
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