One of the ways we have defined a species is that it can’t breed with another species, be it due to bio mechanics (the sex organs don’t match), or genetics (mismatched chromosomes etc). Humans have tried to create hybrids of closely related species like horses and donkeys, but the resulting mule is sterile. See also tiger lion hybrids etc.
That’s sort of impossible by definition.
One of the ways we have defined a species is that it can’t breed with another species, be it due to bio mechanics (the sex organs don’t match), or genetics (mismatched chromosomes etc). Humans have tried to create hybrids of closely related species like horses and donkeys, but the resulting mule is sterile. See also tiger lion hybrids etc.
But even that definition kind of breaks down in some cases:
https://en.wikipedia.org/wiki/Ring_species