Lurklen wrote...
Maria Caliban wrote...
Tigers and lions might be subspecies, but donkeys and horses are not. Like donkeys and horses, humans and chimps 'split' ~ 5 million years ago.
AtreiyaN7 wrote...
Chimps are our closest relatives, and if we can't crossbreed with them...
That was actually my point. We have no idea if humans can crossbreed with chimps. It's unlikely, but it's not like this is something we've tried, and human/chimp sexual relations are neither numerous or well-documented.
The national enquirer would disagree with you, they have enough documentation to fill a wharehouse. Just because Chimps are our closest living relative (so to speak) doesn't mean there couldn't have been others. It just didn't happen here or if it did none of those species survived. There has been evidence of the possibility of ****** sapian and Neandrathal interbreeding, now there aren't any Neandrathal surviving today but there could have been. And they would have looked as different from us as dwarves or elves, but that doesn't mean it would have been impossible for offspring to occur.
Also there has been a successful birth from a mule, meaning a mule gave birth to another mule instead of to a horse or a donky(or being infertile) something that was long thought to be impossible. So if that can happen, who knows what else is possible?
Neanderthal are an interesting question. There are some anthropologists who argue that they should be called ****** sapiens neanderthalensis, implying that they are a subspecies of ****** sapiens and even that they assimilated with us, rather than becoming extinct. On the other hand, a study a few years ago found that European humans were no more similar genetically to neanderthals than the rest of humanity, and since neanderthals were mostly seen in southern Europe, they argued that implied little interbreeding occurred, if it was indeed possible.
Also of interest is that the neanderthals actually had slightly larger brains than us on average, not that brain size is that significant a predictor of intelligence. They never developed as complicated tools or the cave paintings that charcterize the Cro Magnon man. On the other hand, ****** sapiens didn't do that either until about 30,000 years ago, despite appearing physically modern as far back as 100,000 years ago, at least as far as can be determined from bones. Some people of argued that modern humans made a great leap forward based on complex language skills and that Neanderthals vocal apparatus was not as ideally designed for complicated speech. I don't think much of that theory, however, as human beings are quite capable of developing elaborate communication with limited numbers of phonemes or even without speech at all.
Edited to add: I'm not saying that language might not have played an important role, only that I doubt that the reason neanderthals didn't communicate as effectively was due to more limited vocalizations.
Modifié par maxernst, 11 novembre 2010 - 11:47 .