Dear Mr. or Ms. Evolutionary Biologist, Thank you in advance for your time, of which I hope not to waste too much. If you happen to be an ursinologist, your assistance will be especially welcome. Before I start, I think it it is only fair that you know the audience. I should properly identify myself as a Christian, so that you will be aware of the possibility my confirmation bias (which I believe everyone has) could unduly affect my interpretation of published scientific evidence. I also believe in supernatural creation, because I am well aware that life cannot evolve until it exists. However, I typically describe myself as theist-agnostic. By that, I simply mean that I believe in the Judeo-Christian supernatural creator God called Yahweh, and I also believe that Jesus was the promised, crucified, and resurrected Messiah. That's the "theist" part of the descriptor. On the other hand, I also realize that I actually don't know very much when it comes to answering the existential questions. That's the reason for the "agnostic" qualifier...I can't even claim that my beliefs constitute knowledge, because sometimes beliefs turn out to be wrong. Pleading agnosticism is admitting to ignorance. My desire to become less ignorant is the reason for writing you this letter. So without further ado, please allow me to get right to the crux of what I want to know: what special characteristics of any two species of bears makes it necessary for them to be classified as more than one species?  After all, there are five billion or so humans on earth, all properly … [Read more...]