I keep seeing people posting photos of their rats with nuts larger than their legs. I also went to the pet store recently to pick up something for my cats, and saw a bunch of rats in a cage with fat hangers. What is that about? Is that common in rodents?
In: Biology
The more sexual partners the females have, the more evolutionary advantageous it is for males to produce more sperms to increase their odds. It’s like an arm race.
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