Anal evolution may have promoted the body plan for all advanced animals, including humans
Mattlphotography / Alamy
The anus is a very successful innovation, how did it evolve? Genetic analysis suggests that it probably started as an opening used to release sperm that was later fused with the intestine.
“Once you have a hole, you can use it for other things.” Andreas Hezinol At the University of Bergen, Norway.
It is believed that early animals evolved…
Source: www.newscientist.com
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