Amazing Wonders of The World! |
From
the mysterious sailing stones of death valley to red tides, ornage
moons and ice circles - our world is full of these bizarre phenomena! Here are 13 of the most interesting wonders of this planet!
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1. Sailing Stones
The mysterious moving stones of the
packed-mud desert of Death Valley have been a center of scientific
controversy for decades. Rocks weighing up to hundreds of pounds have
been known to move up to hundreds ofyards at a time.
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Some scientists have proposed that a
combination of strong winds and surface ice account for these
movements. However, this theory does not explain evidence of different
rocks starting side by side and moving at different rates and in
disparate directions. Moreover, the physics calculations do not fully
support this theory as wind speeds ofhundreds of miles per hour would be
needed to move some of the stones
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2. Columnar Basalt
When a thick lava flow cools, it
contracts vertically but cracks perpendicular to its directional flow
with remarkable geometric regularity-in most cases forming a regular
grid of remarkable hexagonal extrusionsthat almost appear to be made by
man.
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One of the most famous such examples
is the Giants Causewayon the coast ofIreland (shown above), though the
largest and most widely recognized would be Devils Tower in Wyoming.
Basalt also forms different but equally fascinating ways when eruptions
are exposed to air or water.
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3. Blue Holes
Blue holes are giant and sudden drops
in underwater elevation that get their name from the dark and
foreboding blue tone they exhibit when viewed from above in relationship
to surrounding waters. They can be hundreds of feet deep and while
divers are able to explore some of them they are largely devoid of
oxygen that would support sea lifedue to poor water circulation -
leaving them eerily empty.
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Some blue holes, however, contain ancient fossil remains that have been discovered, preserved in their depths.
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4. Red Tides
Red tides are also known as algal blooms sudden influxes of massive amounts of colored single-cell
algae that can convert entire areas of an ocean or beach into a blood
red color. While some of these can be relatively harmless, others can be
harbingers of deadly toxins that cause the deaths of fish, birds and
marine mammals.
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In some cases, even humans have been
harmed by red tides though no human exposure are known to have been
fatal. While they can be fatal, the constituent phytoplankton in red
tides are not harmful in small numbers.
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5. Ice Circles
While many see these apparently
perfect ice circles as worthy of conspiracy theorizing, scientists
generally accept that they are formed by eddies in the water that spin a
sizable piece of ice in acircular motion. As a result of this rotation,
other pieces of ice and flotsam wear relatively evenly at the edges of
the ice until it slowly forms into an essentially ideal circle.
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Ice circles have been seen with
diameters of over 500 feet and can also at times be found in clusters
and groups of different sizes as shown above.
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6. Mammatus Clouds
True to their ominous appearance, mammatus clouds are often harbingers of a coming storm or other extreme weather
system. Typically composed primarily of ice, they can extend for
hundreds of miles in each direction and individual formations can remain
visibly static for ten to fifteen minutes at a time. While they may
appear foreboding they are merely the messengers - appearing around,
before or even after severe weather.
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7. Fire Rainbows
A circumhorizontal fire rainbow arc
occurs at a rare confluence of right time and right place for the sun
and certain clouds. Crystals within the clouds refract light into the
various visible waves of the spectrum but only if they are arrayed
correctly relative to the ground below.
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Due to the rarity with which all of these events happen in conjunction with one another, there are relatively few remarkable photos of this phenomenon.
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8.Sinkholes
Sinkholes are one of the worlds scariest natural phenomena.
Over time, water erodes the soil
under the planets surface until in some cases, quite suddenly,the land
above gives way and collapses into the earth. Many sinkholes occur
naturally while others are the result of human intervention.
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Displacing groundwater can open
cavities while broken pipes can erode otherwise stable subterranean
sediments. Urban sinkholes, up to hundreds of feet deep have formed and
consumed parts of city blocks, sidewalks and even entire buildings.
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9. Penitentes
Named after peak-hooded New Mexican
monks (lower right above), penitentes are dazzling naturally-forming ice
blades that stick up at sharp angles toward the sun. Rarely found
except at high altitudes, they can grow up taller than a human and form
in vast fields.
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As ice melts in particular patterns, valleys formed by initial melts leave mountains in their wake. Strangely, these formations ultimately slow the melting process as the peaks cast shadows on the deeper surfaces below and allow for winds to blow over the peaks, cooling them. |
10. Lenticular Clouds
Ever wonder the truth about UFOs?
Avoided by traditional pilots but
loved by sailplane aviators, lenticular clouds are masses of cloud with
strong internal uplift that can drive a motorless flyer to high
elevations. Their shape is quite often mistaken for a mysterious flying
object or the artificial cover for one.
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Generally, lenticular clouds are formed as wind speeds up while moving around a large land object such as a mountain.
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11. Sundogs
Sundogs are the product of light
passing through crystals. The particular shape and orientation of the
crystals can have a drastic visual impact for the viewer, producing a
longer tail and changing the range of colors one sees. The relative
height of the sun in the sky shifts the distance the sundogs appear to
be on either side of the sun.
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Varying climactic conditions on
otherplanets in our solar system produce halos with up to four sundogs
from those planets perspectives. Sundogs have been speculated about and
discussed since ancient times and written records describing the various
attributes of our sun date back the Egyptians and Greeks.
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12. Fire Whirls
Fire whirls (also known as fire
devils or tornadoes) appear in or around raging fires when the right
combination of climactic conditions is present. Fire whirls can be
spawned by other natural events such as earthquakes and thunderstorms,
and can be incredibly dangerous, in some cases spinning well out of the
zone of a fire itself to cause devastation and death in a radius not
even reached by heat or flame.
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Fire whirls have been known to be nearly a mile high, have wind speeds of over 100 miles per hour and to last for 20 or more minutes.
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13. Orange Moons
This last phenomena is something most
people have seen before - beautiful orange moon hanging low in the sky.
But what causes this phenomena? And, for that matter, does the moon
have a color at all? When the moon appears lower on the horizon,rays of
light bouncing off ithave to pass through a great deal more of our
atmosphere which slowly strips away everything but yellows, oranges and
reds.
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The bottommost image above is true to
the hues of the moon but has enhanced colors to more clearly show the
differences in shade that illustrate the mixed topography and minerology
that tell the story of the moons surface. Looking at the colors in
combination with the craters one can start to trace the history of
impacts and consequent material movements across the face of our
mysterious moon.
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vendredi 5 septembre 2014
Amazing Wonders of The World!
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