356: Screaming in a Large Space
Dear Hank & John
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Do You Know What the DNA Is?
There are several species of South American, American, Salander. Each of them can interbreed with each other and they're sort of geographically distributed from the north to the south. The ones from the very far south cannot interbreed from the ones with the ones from theVery far north because they're too different. But the each of the steps in between, they can all interbreed. So they're like the ones all the way to the south can with a little bit north and a little part north and alittle bit north. They can make fertile babies. But all the way, if you go from thevery far south to the very far north, you can't anymore
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