Search this Blog

Friday, March 30, 2012

Wonders Of The Nature !!!

Wonders Of The Nature
WebEcoist and Environmental Oddities
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 of yards at a time. 

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 of hundreds of miles per hour
would be needed to move some of the stones.

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 extrusions that almost appear to be made by man. 

One of the most famous such examples is the
Giants Causeway on the coast of Ireland (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.

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 life 
 due to poor water circulation - leaving them eerily empty. 

Some blue holes, however, contain ancient fossil remains
that have been discovered, preserved in their depths.

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.

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.

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 a circular 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. 

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.

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.

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. 

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.

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. 

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.

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. 

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. 

Generally, lenticular clouds are formed as wind speeds up
while moving around a large land object such as a mountain.

11. Sundogs

Like light pillars, 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. 

Varying climactic conditions on other planets 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.

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. 

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.

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 it have to pass through a great deal more
of our atmosphere which slowly strips away everything but yellows, oranges and reds. 

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.

No comments:

Post a Comment

Note :

Most of the contents are published here were collected through email and Internet. I bear no responsibility for these contents.