Ok its always bugged me, that science says stuff, but how do they know??
Like dogs see in Black and white. Ummmm ever spoken to a dog and asked them lol
Fish feel no pain when hooked. Ever asked a fish that question,.
That other things do not speak, how do we know???
This is always taken as a matter of fact, but is it???
As our technology gets better, we gain a greater understanding, an example would be back in the 50's elephants only vocalised in herds etc, now we have technology that lets us here them communicating over vast distance, it was just our technology was not able to pick up on these noises back in the 50's so it was taken that other than what we heard.
So how can we say this and that, surely its all based on our own human limitations , cuz we think we are the smart ones???
So surely its abit big headed of us to presume anything.
Scientists often come out with bold claims and then years later get debunked. That's not to say it's all nonsense, just that we need to take these claims as less than fact. I have often wondered about the eyesight thing....I suppose they can tell how the eye physically works and whether it is capiable of resolving colours but they have no way of telling how the brain interprets and how the conscious creature experiences. As far as fish feeling no pain, I reckon thats just so the fishermen have an excuse.....I like to fish but I still think that a fish reacts differently when you're trying to get the hook out than if it's just hanging there.
Yes we think we're so clever but we often show how silly we really are.
According to Journal of the Veterinary Medical Association (1995) the fundamental design differences between canine and human vision is that our vision is optimized for seeing in bright light, while dogs see best in dimmer light.
The retina (a structure at the innermost layer of the eye that senses light and sends visual information to the brain) has two types of photoreceptor cells -- rods and cones. These respond to light and transmit electric impulses to the optic nerve through a series of chemical reactions. Rods process visual information in dim light and are sensitive motion detectors, while cones handle color and detail. The human retina contains approximately 100 million rods and 7 million cones.
Cone cells contain pigments that perceive specific wavelengths of color. Human vision is trichromatic -- meaning there are three types of cones that recognize different portions of the color spectrum. These cones allow humans to see a range of colors that are a mix of red, blue, and green pigments. Dogs have only two types of cones -- their dichromatic color vision is similar to that of a human with red-green color-blindness. In addition, a dog's retina contains a much smaller ratio of cones to rods than ours does.
So dogs see in a hazy colour, how do we know? We took apart numerous dog eyeballs and analysed cell types. Knowing what each type does, allows us to predict the view from the dogs world.
medickinson you are making my point, we assume we know, but we don't, we just compare everything to us, but everything, every animal is different.
So we looked at animals brains and eyes and, what does that show. So they don't have cells like us, maybe their cells are more advanced than ours, we don't know lol
lol I remember learning in Biology, what was needed for life, gave you a list of things, now we have found things living 1,000, s of feet below the ocean, which proves that to be wrong as well.
Goose3 wrote
So we looked at animals brains and eyes and, what does that show. So they don't have cells like us, maybe their cells are more advanced than ours, we don't know lol
Most mammals have a very similar make up, where the cells are pretty much the same. Plus we have optical and chemical analysis techniques so that we can see inside a cell and check that animal cells are the same. Eyes for dogs and humans have the same basic components, iris, retina etc, and they process light in the same way, along the optic nerve to the brain. As we know that the wavelength of light determines its colour, so by lacking in certain colour receptors in the eye (cone cells), dogs do not have the ability to detect certain colours. The way that the eye works is quite simple and there are only a few components, so most mammals have the same compoenents with slight modifications depending on their foodsource and nocturnal activities.