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Rats can't puke.

http://www.ratbehavior.org/vom...

Thanks for that. I'm most impressed by the knowledge that the vomiting response of the wrinkled frog varies seasonally.

Rats can't puke.

http://www.ratbehavior.org/vom...

Irrelevant. Geographic separation is a direct cause of speciation.

That doesn't imply that they are not able to interbreed. Besides the fact that the definition of species is much more complex and foggy than what you said, we know that sometimes even different species can, in facts, interbreed succesfully: http://www.ratbehavior.org/Hybridization.htm#Fertile http://en.wikipedia.org/wiki/Leopard_cat#Leopard_cats_as_pets .

PBS had a special on the role of humans in canine evolution. The theory is that as human society developed, wolves that were more docile and not as aggressive as other wolves would prosper on what we threw away and thus we encouraged that behavioral trait in the animals. As time progressed, they were integrated into our society for having similar tactics and goals when it came to hunting and the 2 species have been inseparable ever since. Though it would appear that this is somewhat impossible for there to be so many breeds (or species) of dogs in such short period of time consider the example of Belyaev's silver foxes. In only 40 years, the foxes had become an almost different species. The females went into heat twice a year instead of once, the fur color had completely changed along with different ear, tail, and skull shape and even barked like domesticated dogs. All of this was because they selectively bred the more docile exclusively.

Rats can't puke

if it makes them sick, they throw it up and remember not to eat it again- apparently they have very good memory.

Rats cant vomit

Nitpick: Rats can't vomit.

Rats actually cannot vomit, but otherwise you are pretty much correct.

You can increase the human life span with a very simple procedure; castration.

Rats have been shown to live longer when castrated,
and this is possibly related to the activity of the pineal gland or by lowering testosterone, which is carcinogenic, as well as lowering the metabolic rate. Metabolic problems, in particular, are linked to aging. Resveratrol from red grape skins is a lipase inhibitor, helps prevent the body's absorption of fat. It effectivly reduces a person's calorie intake, and as long as food is held constant it has been linked to increased lifespan (as has good old fashioned starvation to the point that a person's reproductive system shuts down.)

Many human studies seek to explain the lifespan differences in people due to environmental factors such as reduced disease transmission.

While eunichs can still have sex, chronic low-level inflammation by pathogens like chlamydia have been strongly linked to atherosclerosis, as well as diabetes. Some oncogenic viruses have been linked to cancer.

I have to wonder just how well the rash of diabetes in a population correlates with mean and median number of sexual partners in that population.

Just wait before the thing is loaded with garbage trown in,
and no one wil ever want to walk past it.
.. Ahhh modern art .. full of hidden sides.

However I still prefer the clasic 'brick' art... one word: 6.