The whole man-horse thing raises interesting questions. I mean, on the one hand it's not actually impossible; on the other, it's so wildly unlikely that I'd have to see a body.
(ETA: To be clear, I'm not saying that I believe centaurs exist. What I mean is that they may be possible to create, which is a fun topic to speculate about--particularly given that Horner opened the door to such experimentation.)
The number of limbs mammals have is genetically controlled. If you were to tweak those genes, you could end up with a six-limbed critter. This would probably kill the critter, however, so you could only really do this in a lab setting at this point (and even there it'll be incredibly tricky). The other option is to have had two lineages of terrestrial vertebrates--one four-limbed lineage, like us, and one six-limbed, like centaurs and dragons sensu stricto and gargoyles and all the rest. That wouldn't lead to man-horses, though; lizards and mammals are much more similar than four-limbed and six-limbed tetrapods would be, and you don't see reptilian humanoids anywhere in the fossil record.
Still, it'd be fun to play with the HOX genes and see if you could develop a six-limbed horse. If nothing else, it'd be an interesting study on the degree to which HOX genes control development, and the plasticity of mammals (something that could have implications for evolutionary theory). So I could see someone deciding "Why not?"
The face is also weird. Horses have the mouths they do for a reason--to chew grass. Apes have the mouths they do for a reason--the wider variety of food, and the less-abrasive food, we eat. You can't have a horse with a human face, because the teeth wouldn't function properly. You CAN have a human that eats hard-to-chew food; we've found fossils of some. They look rather odd, but didn't have an "evil leer" any more than a gorilla does. Also, I find it very odd that someone would scream in fright over a near-human face anymore. After all, all sci-fi aliens are exactly that: near-human. If I saw something with a near-human face I'd be curious, maybe afraid (depending on what the rest of the critter looked like!), but I certainly wouldn't scream in terror.
As far as trustworthyness goes, it's an invalid criteria. I've studied morphology more than most, and I still see weird things. Then I look again and realize that no, my brain was just playing tricks on me. Bad eyesight combined with a quick glance combined with preoccupation combined with a sadistic brain result in seeing all sorts of things. I still see the face of a girl I once knew all over the place.
(ETA: To be clear, I'm not saying that I believe centaurs exist. What I mean is that they may be possible to create, which is a fun topic to speculate about--particularly given that Horner opened the door to such experimentation.)
The number of limbs mammals have is genetically controlled. If you were to tweak those genes, you could end up with a six-limbed critter. This would probably kill the critter, however, so you could only really do this in a lab setting at this point (and even there it'll be incredibly tricky). The other option is to have had two lineages of terrestrial vertebrates--one four-limbed lineage, like us, and one six-limbed, like centaurs and dragons sensu stricto and gargoyles and all the rest. That wouldn't lead to man-horses, though; lizards and mammals are much more similar than four-limbed and six-limbed tetrapods would be, and you don't see reptilian humanoids anywhere in the fossil record.
Still, it'd be fun to play with the HOX genes and see if you could develop a six-limbed horse. If nothing else, it'd be an interesting study on the degree to which HOX genes control development, and the plasticity of mammals (something that could have implications for evolutionary theory). So I could see someone deciding "Why not?"
The face is also weird. Horses have the mouths they do for a reason--to chew grass. Apes have the mouths they do for a reason--the wider variety of food, and the less-abrasive food, we eat. You can't have a horse with a human face, because the teeth wouldn't function properly. You CAN have a human that eats hard-to-chew food; we've found fossils of some. They look rather odd, but didn't have an "evil leer" any more than a gorilla does. Also, I find it very odd that someone would scream in fright over a near-human face anymore. After all, all sci-fi aliens are exactly that: near-human. If I saw something with a near-human face I'd be curious, maybe afraid (depending on what the rest of the critter looked like!), but I certainly wouldn't scream in terror.
As far as trustworthyness goes, it's an invalid criteria. I've studied morphology more than most, and I still see weird things. Then I look again and realize that no, my brain was just playing tricks on me. Bad eyesight combined with a quick glance combined with preoccupation combined with a sadistic brain result in seeing all sorts of things. I still see the face of a girl I once knew all over the place.
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