Quote:
Originally Posted by photon
Yup, as species diverge it's not unusual for them to crossbreed. Speciation isn't a hard line it's fuzzy. A population that gets separated and starts to diverge will go through stages from easily breeding with each other to more difficult, to offspring being sterile, to not being able to breed at all.
Ring species are a good example of this.
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I had my doubts, but the fact you have a learned looking man smoking a pipe as an avatar has convinced me.