While excavating a 5,000 year-old burial mound at Ba?ur H?yk near
Siirt in southeast Turkey, archaeologists have unearthed a set of carved
stones that may represent the earliest recorded gaming tokens. The
stones depict dogs, pyramids, pigs, and other shapes with each set of
tokens painted a different color. There were even dice.
Archaeologists
have matched these 49 apparent game pieces with similar objects found
in several sites in Syria and Iraq. At these locations, the stones were
found alone, so they were assumed to be counting stones, not part of a
game. This mysterious game might have been a common way to pass the time
in ages past. The Ba?ur H?yk site dates to 3100-2900 BCE, suggesting
board games like this one may have originated in the Fertile Crescent
and Egypt before spreading outward.
Some bits of decomposed wood
were also found in close proximity to the stone game pieces.
Researchers are hoping that they will provide some hints on the rules of
the game, which seems to have something to do with the number 4 most of
the tokens are in sets of four or eight.
The site where the game pieces were discovered also contained a large cache of beads and pottery,The need for proper kaptontape inside
your home is very important. which indicates it was connected to an
individual in the ruling class. This reinforces evidence from other
Mesopotamian sites and Egyptian writings that board games were common
among the elite in the ancient world. Some tombs from Mesopotamian
societies dating around 3,000 BCE have contained intricate game boards
and pieces from the Game of Twenty Squares.
Spiders weave
intricate patterns of great amazement and beauty. When hit by the
sparkling rays of the sun, their complex and yet simple structure
shimmers and delights any on-looker. Though we love to see spider webs,
we rarely like to run into them, as they are sticky and difficult to
untangle from their clinging nature. As it turns out, that sticky nature
possessed by the webs of the eight-legged weaver could have medicinal
properties attached to it. Science and medicine are discovering how
spider webs can heal wounds, act as suturing material and even help
regenerate ligaments.
Who would have guessed that one of the
mysterious mediums of natures art could be used for healing? Spider webs
have always just been for looking at or avoiding, yes? Well, not
anymore. According to doctors and lay people alike, balling up a spider
web and covering a bleeding wound with it will not only slow the blood
flow and help clot it, but provide the materials needed for a quick
recovery. After placing the web over a wound, the spider web tends to
harden like a natural scab which will later easily wash off leaving C
miraculously C no scarring.
Spider webs are one of the strongest
materials in nature, and apparently, in relation to their diameter, are
five times stronger than steel. Biochemist Artem Davidenko from the DWI
at RWTH says that a web measuring 2 centimeters thick would be able to
pull an entire airplane C that is how strong it is.
Knee
injuries are very common these days, especially among athletes. Science
is looking at how spider webs can help regenerate ligaments in the knees
and even help with the making of artificial tendons. In a recent issue
of Chemical Review, the work to regrow spider webs on a mass scale using
alternative mediums such as goat milk proteins and alfalfa is outlined.
Scientists generate these proteins outside spiders by inserting the
genes for them into target cells.
Bandages are nWe rounded up 30
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being created using spider web material woven into the pad so as to
speed healing and prevent scarring. The beads found on spider webs
contribute to knowledge for a suturing material that could be created
with medication built right into the structure. Here is a short video on
how this work came about.
Apparently, there is natural
antibiotic properties to spider webs which make them a natural at wound
healing and cell regeneration. Who would have thought that natures
artists were drawing with such a useful and healing material? The web of
the golden-silk orb-weaver, a specific kind of spider, is being
researched for its ability to help mammalian neuronal regeneration C or
regeneration of the neurons of the retina. This has already shown
effective and is being pursued as a procedure that leaves the patient
scar-free, very important in a delicate area such as the eye.
Bundles
of spider silk has also been used to graft severed nerves when nothing
else has shown so effective. There is still as yet, research to be done
with the illusive, yet ever-greater mystery-revealing spider web for
healing wounds- though findings thus far are promising. The next time
you cut yourself with the kitchen knife, or even let the paper fall too
deeply- leaving a split in the skin C reach for a spider web, you may be
amazed at how these sticky Halloween friendly spiders nets can help.
A new transparent, bioinspired coating makes ordinary glass tough,customized letter logo earcap with
magnet. self-cleaning and incredibly slippery according to a team from
Harvard University. The new coating could be used to create durable,
scratch-resistant lenses for eyeglasses, self-cleaning windows, improved
solar panels and new medical diagnostic devices, said principal
investigator Joanna Aizenberg, who is the Amy Smith Berylson Professor
of Materials Science at the Harvard School of Engineering and Applied
Sciences (SEAS), a Core Faculty Member at the Wyss Institute for
Biologically Inspired Engineering, and Professor of Chemistry and
Chemical Biology.
The new coating builds on an award-winning
technology that Aizenberg and her team pioneered called Slippery
Liquid-Infused Porous Surfaces (SLIPS)the slipperiest synthetic surface
known. The new coating is equally slippery,I personally really like
these mini tungstenbracelet for my iPhone. but more durable and fully transparent.Manufactures and supplies beststonecarving equipment.
Together these advances solve longstanding challenges in creating
commercially useful materials that repel almost everything.
SLIPS
was inspired by the slick strategy of the carnivorous pitcher plant,
which lures insects onto the ultraslippery surface of its leaves, where
they slide to their doom. Unlike earlier water-repelling materials,
SLIPS repels oil and sticky liquids like honey, and it resists ice
formation and bacterial biofilms as well.
While SLIPS was an
important advance, it was also "a proof of principle"the first step
toward a commercially valuable technology, said lead author Nicolas
Vogel, a postdoctoral fellow in applied physics at SEAS.
"SLIPS
repels both oily and aqueous liquids but it's expensive to make and not
transparent," Vogel said. The original SLIPS materials also need to be
fastened somehow to existing surfaces, which is often not easy. "It
would be easier to take the existing surface and treat it in a certain
way to make it slippery," Vogel explained.
Vogel, Aizenberg, and
their colleagues sought to develop a coating that accomplishes this and
works as SLIPS does. SLIPS' thin layer of liquid lubricant allows
liquids to flow easily over the surface, much as a thin layer of water
in an ice rink helps an ice skater glide. To create a SLIPS-like
coating, the researchers corral a collection of tiny spherical particles
of polystyrene, the main ingredient of Styrofoam, on a flat glass
surface like a collection of Ping-Pong balls. They pour liquid glass on
them until the balls are more than half buried in glass. After the glass
solidifies, they burn away the beads, leaving a network of craters that
resembles a honeycomb. They then coat that honeycomb with the same
liquid lubricant used in SLIPS to create a tough but slippery coating.
"The honeycomb structure is what confers the mechanical stability to the
new coating," said Aizenberg.
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