Evolution would've given us infrared eyesight

Hi Rick, welcome to EvC. I hope you want to learn. How would this be a benefit to warm blooded humans? The radiant heat from our heads would spoof the receptors. Imagine trying to see when your eyes are glowing like light bulbs.So, the significant advantage you trumpet would be practically useless for mammals.You also imply that evolution ”should’ have found a solution that your particular god has not deigned to use.If it’s not good enough for your particular god (I have no idea which god you are referring to however), why should evolution select it?Kind of points to your god of choice being too dumb to give us this tremendous advantage.I can’t help thinking (yet again) that as a creo you have no idea what ToE actually states. I think you will find that fish (such as piranha) don’t have a thermographic sense like vipers do (they however, do have fully fledge thermo receptors a la Predator). The fish can simply see into the near infra red where the wavelength is better at penetrating the sediment of the Amazon.Vipers and some pythons actually do see like Predator but they are cold blood so their relatively low body heat will not interfere with the heat sensitive pits on their snouts (not their eyes).You see, the thing about evolution is that it takes the path of least resistance form any given point. So when our shrew-like ancestors where scampering through the trees the visible spectrum was adequate (not perfect) for the job. With no selection pressure to select thermograpic optics (which would require a radical retune of the eye) you won’t see it.By your logic humans should have wings, too.Animals have the sense they need to get by. If humans really did have thermographic vision on top of visible spectrum vision (with the extra cells, insulation and neural pathways to use it) it would be very strange indeed from an evolutional perspective.This would be evidence against evolution.You have created a strawman ”vision’ of what natural selection ”should’ have produced and tilted against it a la Don Quixote.After all, we would be asleep most of the time it would be useful. Seems that the survival advantage it would bring would be less than you think.The bottom line is that we don’t have Predator vision because we don’t need it to survive long enough to breed.

Good point. We also have a dire need to sleep (humans, that is) and constant activity would have been a hinderance to resting and refuel the old hypocampus and amygdala ATP levels.Also, I would imagine that it is more energy efficent to sleep than to compete with animals 24 hours a day.This makes me wonder: do Predators have heat proof eyelids? How else would they get any shut eye?

Seems that snakes detect far infra red with thermo receptors that function like a pin hole camera and then clean the image up with some fancy snake brain alogrithm.It's pretty clear that the kind of tectum humans have would require radical retuning if (for the sake of arguement) we had heat pits.http://www.physorg.com/news76249412.htmlThis means that the way they work is not (as you say) by bleaching rods or cones but by direct thermoception.Good old wiki points out that these snakes frequent colder areas.Infrared sensing in snakes - WikipediaABE: Your kitty is so cute!Edited by Larni, : Cat praise

A better expression would be to play with cards you have been dealt.

Hi Rick. Because we are in a science forum you need to support your belief with positive evidence. You sound like a good sort so please take this advice in the spirit it is given:You will get very short thrift in a science forum using 'I believe' as support for your assertion.Can you supply supporting evidence for your assertions? There is no reason to think that evolution of such pits should have occurred in humans as this would violate ToE. Can I ask you what evidence would evidence would make you accept it? Here's the thing, Rick. You add an extraneous undetectable entity into the mix. If you take out your god it all falls into place and is supported by the evidence.Creationism just is not supported. You have stated what you believe but have provided no supporting evidence for your statements.Edited by Larni, : No reason given.Edited by Larni, : No reason given.

You know that never entered my head.Guess you live and learn, eh?

{Irrelevant blather hidden. Stop polluting the topic with such. - Adminnemooseus}Edited by Adminnemooseus, : See above.

Hi Rick.You've made it pretty clear that you do not beleive evolution takes place in the world today and many people here have challenged you about your position.It's pretty clear that ToE is the only accepted theory for the mechanism of evolution (creationsim does not stipulate a mechanism for the act of creation).It seems you disagree for the reasons you have given.Given this, how do you account for the almost universal acceptance of ToE in the scientific and religious world. Don't forget that the Pope recognised ToE as not contadicting the existance of his (and I would hazard) your god?I guess I'm wondering why you believe you are right and His Holyness the Pope is wrong.Edited by Larni, : No reason given.

I thought the Yahweh was omniscient?

Sorry, but that sentence does not make sense: could you rephrase it?

Are you trying to ask me the reason why the god of the Christian bible does not have infra red vision?Or why the god of the Christian bible should have infra red vision?

I have no idea what you are trying to communicate to me, sorry.

Hi Brad.The problem here is that this site likes to keep the focus on threads as tight as possible.The OP is asking why it has not happened that we (humans) do not have IR vision (although I suspect the OP meant thermographic vision).Not what would be required for it to happen e.g. a change in the spectral sensitivity of human eyes (or equivalent heat pits for thermographic vision).Two slightly different questions. EvC Forum: EVOLUTION'S FRAUD HAS CONTRIBUTED TO ITS PUBLIC ACCEPTANCE: EvC Forum: Adding information to the genome.Hope this helps to point you in the right direction.

Cool.I was thinking of the human skulls but you're probably right.

Thermograhic visions works in such organisms as snakes because they hunt mammals who have body temperatures much higher than the snake (otherwise the snakes own body heat would baffle its thermoreceptors).It would be like having light pour forth from our eyes; we would not be able to see.Seeing a little further into the IR range would mean we would have to loose some of our other receptors and would have more difficulty in bright light.In an evolutionary context it would not occur.