Posted on 04/12/2009 12:15:48 PM PDT by 1believer
# De Principiis Cogitandi. Liber Secundus. (1 result) 11 Visa tamen tardi demum inclementia morbi
# Luna habitabilis (1 result) 24 Visa tibi ante oculos, et nota major imago.
Not that I wasn’t happy to see my mother, of course, but I had to get off the sofa and do stuff!
free dixie,sw
Bogart alert.
I’m sure my children find me a pain - but when they get out into Real Life, they’ll find there are lots of worse things than having to put your clean clothes away!
fwiw, mine is 92 & she CAN be (though i dearly love her) a real pain.
free dixie,sw
OldTax-lady will be 71 tomorrow.
may she have MANY more.
free dixie, sw
I hope so, too. My grandmother (Dad’s mother) got to see three great-grandchildren. I hope Mom will have more if she lives to 89; I’ll have at least five children old enough to marry and have kids by then.
lol you two. sitting here in newark with depsrture way late. wont have my usual dinner.
and bob is right, very busy schedule this time
LOL!
I’m watching “Waking the Baby Mammoth” and will most likely not be on much until it’s over. And then it will be bedtime for Bonza!
Post when you can, sion.
Uranium scorpions if I can find them.
Some spiders also fluoresce.
Some animals see UV, so if you are huntin said animals you should use detergent wiothout optical brighteners.
(Wave a UV light over your shirt.. oopsies, you glow.)
If you are hunting animals that see UV light ... maybe you shouldn’t be.
LOL!
Good point, but they do taste good.
Hmm. What beside raptors and honeybees see UV light?
Venison.
They see reflected UV off our clothes from optical brighteners in the detergent, so we glow like a lightbulb under sunlight to them.
The color vision of many nonhuman vertebrates differs from that of humans in several respects. Most notably, many mammals, including deer, pigs, cows, other ungulates, rabbits, squirrels, dogs and cats have only two populations of cone photoreceptors compared with three in humans.
Pigs, for example, have two photopigments with absorption maxima at about 440 nm and 560 nm (Neitz et al. (1989), Visual Neuroscience 2: 97-100). These species are said to possess dichromatic vision. Dichromatic vision results in a very limited color perception compared with trichromatic.
Whereas trichromatic humans can perceive several hundred color gradations from different wavelengths in the visible spectrum, dichromatic animals can perceive only two distinct colors with gradations of colorlessness in between.
Thus, at low wavelengths of incident light, a dichromat perceives a blue color. As the wavelength is raised, the intensity of blue color decreases. Eventually, the blue color completely disappears and the light appears entirely colorless. On further increasing the wavelength, an increasing intensity of yellow appear, until eventually the yellow light appears relatively pure (i.e., saturated).
The wavelength at which light appears entirely colorless, untinted by either blue or yellow coloration, is that at which the two populations of cone cells are equally stimulated. This wavelength is known as the neutral point.
The colorless light, at or around the neutral point, is perceived as white or a shade of gray, depending on its intensity and the background illumination.
A further notable difference in vision between many nonhuman vertebrates and humans, is that the former lack the human's yellow coloration of the lens of the eye. In nonhuman vertebrates lacking the yellow coloration, short wavelength blue and ultraviolet light that would be filtered out in humans, reaches the nonhuman's retina.
Thus, some nonhuman vertebrates have much greater sensitivity that humans to short wavelength light.
The rest of the lengthy article describes techniques for camouflaging the hunter, as opposed to camouflaging the soldier.
Camouflage Materials
Very interesting!
All relatives (except immediate) have now returned home. That means bedtime for Wednesday and me, as soon as I get Bill and Tom to their beds. (They’ll hate me, of course.)
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.