Cano Cristales: The River of Five Colors

on Thursday, 12 January 2012


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The Cano Cristales is a river of Colombia located in the Sierra de la Macarena. For most of the year, Cano Cristales is indistinguishable from any other river: a bed of rocks covered in dull green mosses are visible below a cool, clear current. However, for a brief period of time every year the most amazing transformation occurs - the river blossoms in a vibrant explosion of colors.
During the short span between the wet and dry seasons, the water level drops enough for the sun to warm the moss and algae on the river's bottom, and this warmth leads to an explosive growth of blooms. A unique species of plant that lines the river floor called Macarenia clavigera turns a brilliant red. It is offset by splotches of yellow and green sand, blue water, and a thousand shades in between. This only happens for a brief period in between seasons for a few weeks from September through November.
Cano Cristales has been called the river of five colors or even the most beautiful river in the world.
Cano Cristales is located in a remote, isolated area not easily accessible by road. The site was closed to tourists for several years because of terrorist activity in the region along with concerns about the environmental impact of tourism. It was reopened to visitors in 2009, and today there are several Colombian Tourist Agencies that will fly travelers to La Macarena. From there it is a short trip into "Serrania de la Macarena," the national park in which Cano Cristales is located.
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A Brief History of Chocolate

Chocolate beans and podChocolate beans and pod
When most of us hear the word chocolate, we picture a bar, a box of bonbons, or a bunny. The verb that comes to mind is probably "eat," not "drink," and the most apt adjective would seem to be "sweet." But for about 90 percent of chocolate's long history, it was strictly a beverage, and sugar didn't have anything to do with it.

"I often call chocolate the best-known food that nobody knows anything about," said Alexandra Leaf, a self-described "chocolate educator" who runs a business called Chocolate Tours of New York City.

The terminology can be a little confusing, but most experts these days use the term "cacao" to refer to the plant or its beans before processing, while the term "chocolate" refers to anything made from the beans, she explained. "Cocoa" generally refers to chocolate in a powdered form, although it can also be a British form of "cacao."

Etymologists trace the origin of the word "chocolate" to the Aztec word "xocoatl," which referred to a bitter drink brewed from cacao beans. The Latin name for the cacao tree, Theobroma cacao, means "food of the gods."

Many modern historians have estimated that chocolate has been around for about 2000 years, but recent research suggests that it may be even older.

In the book The True History of Chocolate, authors Sophie and Michael Coe make a case that the earliest linguistic evidence of chocolate consumption stretches back three or even four millennia, to pre-Columbian cultures of Mesoamerica such as the Olmec.

Last November, anthropologists from the University of Pennsylvania announced the discovery of cacao residue on pottery excavated in Honduras that could date back as far as 1400 B.C.E. It appears that the sweet pulp of the cacao fruit, which surrounds the beans, was fermented into an alcoholic beverage of the time.

"Who would have thought, looking at this, that you can eat it?" said Richard Hetzler, executive chef of the café at the Smithsonian's National Museum of the American Indian, as he displayed a fresh cacao pod during a recent chocolate-making demonstration. "You would have to be pretty hungry, and pretty creative!"

It's hard to pin down exactly when chocolate was born, but it's clear that it was cherished from the start. For several centuries in pre-modern Latin America, cacao beans were considered valuable enough to use as currency. One bean could be traded for a tamale, while 100 beans could purchase a good turkey hen, according to a 16th-century Aztec document.

Both the Mayans and Aztecs believed the cacao bean had magical, or even divine, properties, suitable for use in the most sacred rituals of birth, marriage and death. According to Chloe Doutre-Roussel's book The Chocolate Connoisseur, Aztec sacrifice victims who felt too melancholy to join in ritual dancing before their death were often given a gourd of chocolate (tinged with the blood of previous victims) to cheer them up.

Sweetened chocolate didn't appear until Europeans discovered the Americas and sampled the native cuisine. Legend has it that the Aztec king Montezuma welcomed the Spanish explorer Hernando Cortes with a banquet that included drinking chocolate, having tragically mistaken him for a reincarnated deity instead of a conquering invader. Chocolate didn't suit the foreigners' tastebuds at first –one described it in his writings as "a bitter drink for pigs" – but once mixed with honey or cane sugar, it quickly became popular throughout Spain.

By the 17th century, chocolate was a fashionable drink throughout Europe, believed to have nutritious, medicinal and even aphrodisiac properties (it's rumored that Casanova was especially fond of the stuff). But it remained largely a privilege of the rich until the invention of the steam engine made mass production possible in the late 1700s.



In 1828, a Dutch chemist found a way to make powdered chocolate by removing about half the natural fat (cacao butter) from chocolate liquor, pulverizing what remained and treating the mixture with alkaline salts to cut the bitter taste. His product became known as "Dutch cocoa," and it soon led to the creation of solid chocolate.

The creation of the first modern chocolate bar is credited to Joseph Fry, who in 1847 discovered that he could make a moldable chocolate paste by adding melted cacao butter back into Dutch cocoa.

By 1868, a little company called Cadbury was marketing boxes of chocolate candies in England. Milk chocolate hit the market a few years later, pioneered by another name that may ring a bell – Nestle.

In America, chocolate was so valued during the Revolutionary War that it was included in soldiers' rations and used in lieu of wages. While most of us probably wouldn't settle for a chocolate paycheck these days, statistics show that the humble cacao bean is still a powerful economic force. Chocolate manufacturing is a more than 4-billion-dollar industry in the United States, and the average American eats at least half a pound of the stuff per month.

In the 20th century, the word "chocolate" expanded to include a range of affordable treats with more sugar and additives than actual cacao in them, often made from the hardiest but least flavorful of the bean varieties (forastero).

But more recently, there's been a "chocolate revolution," Leaf said, marked by an increasing interest in high-quality, handmade chocolates and sustainable, effective cacao farming and harvesting methods. Major corporations like Hershey's have expanded their artisanal chocolate lines by purchasing smaller producers known for premium chocolates, such as Scharffen Berger and Dagoba, while independent chocolatiers continue to flourish as well.

"I see more and more American artisans doing incredible things with chocolate," Leaf said. "Although, I admit that I tend to look at the world through cocoa-tinted glasses."

Read more: http://www.smithsonianmag.com/arts-culture/brief-history-of-chocolate.html#ixzz1jF045cd1

2,000-year-old Roman cavalry helmet sheds new light on conquest of Britain after experts piece 1,000 fragments back together


Historians have pieced together a 2,000-year-old Roman cavalry helmet 10 years after its discovery in an Iron Age shrine and say it sheds new light on the conquering of Britain. 
The helmet and its cheek pieces have been painstakingly restored from 1,000 small fragments over three years by experts at the British Museum.
Constructed of sheet iron, the helmet, once decorated with gold leaf, is the only one to have been found in Britain with its silver gilt plating intact and is also one of the earliest ever found in Britain.
Roman helmet
Unique: The 2,000 year old silver gilt Roman helmet which was unearthed in a Leicestershire field and painstakingly pieced back together
Metals conservation expert Marilyn Hockey began unearthing the fragments out of a 'big lump of soil' at the British Museum three years ago.
She said: 'Working our way down this enormous lump of clay, we discovered at the bottom some amazing finds ... the emperor cheek piece told us it was something really special.
'To get something straight out of the soil like this is like gold. You can find out so much from it.'
 
The helmet features several scenes of Roman military victory, including the bust of a woman flanked by lions and a Roman emperor on horseback with the goddess Victory flying behind while a cowering figure, possibly a native Briton, is being trampled under his horse’s hooves.
The 2,000 year old Roman helmet is the first of its kind to be found in Britain
Painstaking: It took experts at the British Museum three years to piece together the 1,000 small fragments of the helmet
An artist's impression of what the complete 'Hallaton helmet' might have looked like, created by the British Museum
An artist's impression of what the complete 'Hallaton helmet' might have looked like, created by the British Museum
It is believed to have been buried in the years around the emperor Claudius’s invasion of Britain in AD43.
Experts claim there is a 'distinct possibility' that it belonged to a Briton serving in the Roman cavalry before the conquest of Britain.

They say it changes our understanding of the relationship between Romans and Britons and what the country was like just before the invasion.
It is thought that the helmet may have been buried as a gift to the gods at what was a local shrine on the Briton’s return to the East Midlands.
The helmet was unearthed in Hallaton, Leicestershire, after a metal-detecting enthusiast came across buried coins with his second-hand £260 metal detector.
Retired design and technology teacher, Ken Wallace, 71, called in experts who went on to discover an impressive collection of artefacts.
More than 5,000 coins, ingots and the helmet’s ear guard were among the treasures discovered, along with the remains of a feast of suckling pigs.
Coins from both the British Iron Age and the Roman Empire were found together for the first time.
Mr Wallace and the landowner of the site were paid £300,000 to be split between them for the find.
Mr Wallace said: 'When this ear guard came to the surface we knew it was going to be a Roman cavalry helmet - but what it would look like was anybody’s guess.
'It’s amazing, I never thought I would see it like that. I thought I’d get to see a computer-generated impression. I’ve been extremely lucky.'
Leicestershire County Council has now bought the helmet to go on display at Harborough Museum, just nine miles from where it was buried 2,000 years ago.
Head of research at the British Museum, Jeremy Hill, said his 'mouth dropped' when he saw the object pieced back together.
Precious find: Ken Wallace with the cavalry helmet he unearthed during its unveiling at the British Museum
Precious find: Ken Wallace at the British Museum with the helmet he unearthed. He said he considers himself very lucky to have been able to see it reconstructed
He said that the helmet had helped 'change our understanding of what Britain was like just before the Roman conquest'.
He said: 'Every book on the Roman conquest of Britain is going to have a picture of that helmet in it now.
'Just as we were starting to rethink the importance of the East Midlands in the context of the Roman Empire, it says "bang, you’ve got to rethink it", the same with the relationship between Romans and Britons.'
The helmet may also have been a diplomatic gift to a pro-Roman population, or a spoil of war taken during a raid on a Roman camp or during battle.


Read more: http://www.dailymail.co.uk/sciencetech/article-2084686/Historians-piece-2-000-year-old-Roman-cavalry-helmet-shedding-new-light-ancient-Britain.html#ixzz1jEzgZ3K5

World’s Longest Motorcycle


The longest motorcycle in the world can be found in Russia.
It was built back in December of 2005, by Oleg Rogov, and acknowledged as the world’s longest bike by the Guinness Book of Records. This super-bike can fit 16 people, but the question that has been on everyone’s mind ever since it was first announced, was: can you ride it? It’s hard to believe 16 heavy bikers could move using the world’s longest motorcycle.
The design isn’t the best I,ve ever seen, nowhere near as cool as the Cat1 Uber-bike but definitely better than this Chinese home-made motorcycle.










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5 Amazing Videos About the Earth


If today we don’t think  or do something to save our environment then sooner or later, our beautiful planet will turn to a dessert and inapt for life, so let us unite together and save heritage which was the greatest achievement of our ancestors. The heritage, which we received  from our our ancestors, we have to protect it and transfer to our heirs.

1. Earth Amazing Sights

2. Planet Earth: Amazing Nature Scenery

3. Earth at Night Seen From Space - Time Lapse

4. Earth - Official Movie Trailer

5. David Attenborough - Wonderful World


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The Lost Cities of the Cloud People


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Photo: Cecilia Bermudez
The figures balance aloft on the ledge of a cliff, their gaze fixed where the first rays of the rising sun will appear, waiting for a new day to dawn. Known by the name Warriors of the Clouds, the Chachapoyas were an ancient Andean people who inhabited the mist-swathed rainforests of what is now northern Peru. They were wiped out some five hundred years ago, and looking out over the vast Utcubamba Valley, these figures stand as remnants of their once great civilisation.
Watching, waiting: Ancient Chachapoyas figures at Karijia
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Photo: Cecilia Bermudez
In the remote mountainous Amazonas region of present-day Peru, various relics stand as testimony to the Chachapoyas and what they achieved. The scene just described is the site of Karijia, where six full-size sarcophagi preside over the surrounding territory, and have done for almost a millennium. Made of clay and plant matter, the masked coffins contain the mummified remains of Chachapoya elite. How they were placed in such an inaccessible position, no one knows for certain.
Ancient wise men: Skulls seem to have been part of the decoration too
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Photo: Médéric
Much about the Cloud People is shrouded in mystery. As recently as 2008, a lost Chachapoya city was discovered in the isolated Amazon rainforest during an archaeological expedition to Peru’s Jamalca district, about five hundred miles north-east of Lima. The fortified citadel was found to contain the walls of buildings and rock paintings, and perched on the edge of a chasm – literally carved into the Andes – it may have been used by the Cloud People to keep a lookout for enemies.
Cloud People country: The climb to the Kuelap citadel midst misty mountains 
The_climb_to_Kuelap_misty_mountain_backdropPhoto:
Photo: 10b travelling
Little is known about the Chachapoyas as they left no written records, but it appears their culture began to prosper in the 9th century, when their towering cities were developed, possibly as defensive measures against invading Huaris. However, five hundred years on, their fortunes faltered with the spread of the Inca Empire. Despite fierce resistance, the Cloud People were conquered by the Incas, and were by turns rebelling and being suppressed when the Spanish conquistadors arrived in 1535.
Peaceful scene: Yet the Chachapoyas were in violent conflict with the Incas
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Photo: 10b travelling
The Chachapoyas sided with the Spanish in their fight with the Incas, but European diseases such as smallpox obliterated their population under their new rulers. The Chronicler Pedro Cieza de León wrote that the Chachapoyas were "the whitest and most handsome of all the people that I have seen in Indies, and their wives were so beautiful that because of their gentleness, many of them deserved to be the Incas' wives..." – words that have led to much myth about their strangely fair complexions.
Celebrated cream and white painted structures: Funerary site at Revash
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Photo via Club Amazonas
As well as the standing clay figures like those at Karijia, the Cloud People were also entombed in chullas, brightly painted cliff side crypts with gabled roofs, notably found at the site of Revash. Yet the most impressive construction the Chachapoyas left behind is undoubtedly Kuelap, a monumental fortress 9500 feet above sea level. Protected by massive stone exterior walls, a sheer drop on one side, and dense surrounding forest, Kuelap must have taken some conquering.
Difficult to scale: The ruins of the Kuelap citadel, its walls some 66 feet high
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Photo: Cecilia Bermudez
Containing more than four hundred buildings, Kuelap was a major settlement for its times and may have housed as many as 3500 inhabitants at its peak. Comparable in scale to the famed Inca retreat of Machu Picchu, this 1000-year-old complex shows what the Chachapoyas were capable of. Who knows what else lies waiting to be uncovered deep in the Andean Amazon? Doubtless more secrets of the Cloud People are waiting to be unlocked.

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160 Billion Alien Planets May Exist in Our Milky Way Galaxy


Alien Planets Milky Way
This artists’s concept gives an impression of how common planets are around the stars in the Milky Way. A six-year search that surveyed millions of stars using the microlensing technique concluded that planets around stars are the rule rather than the exception.
CREDIT: ESO/M. Kornmesser  


Alien planets are incredibly common in our Milky Way galaxy, outnumbering stars by a large margin, a new study suggests.
On average, each of the 100 billion or so stars in our galaxy hosts at least 1.6 planets, according to the study, bringing the number of likelyalien worlds to more than 160 billion. And large numbers of these exoplanets are likely to be small and rocky — roughly Earth-like — since low-mass planets appear to be much more abundant than large ones.
"This statistical study tells us that planets around stars are the rule, rather than the exception," said study lead author Arnaud Cassan of the Paris Institute of Astrophysics. "From now on, we should see our galaxy populated not only with billions of bright stars, but imagine them surrounded by as many hidden extrasolar worlds."

Using a cosmic gravity lens
To date, astronomers have discovered more than 700 planets beyond our own solar system, with 2,300 additional "candidates" found by NASA's Kepler space telescope awaiting confirmation.
The vast majority of these exoplanet detections have been made using two different techniques: transit photometry and radial velocity. [Gallery: The Strangest Alien Planets]
Kepler employs the transit method, which watches for the tiny, telltale dips in a star's brightness caused when a planet crosses the star's face, blocking some of its light. Radial velocity looks for minuscule wobbles in a star's movement caused by the gravitational tugs of orbiting planets.
While these two methods have been highly productive, they're biased toward finding planets that orbit relatively close to their parent stars. In the new study, Cassan and his colleagues employed a different technique, known as gravitational microlensing, that feels this bias less strongly.
In gravitational microlensing, scientists watch what happens when a massive object passes in front of a star from our perspective on Earth. The nearby object's gravitational field bends and magnifies the light from the distant star, acting like a lens.
This produces a light curve — a brightening and fading of the faraway star's light over time — whose characteristics tell astronomers a lot about the foreground object.
In many cases, this nearby body is a star. If it has any planets, even ones in relatively far-flung orbits, these can generate secondary light curves, alerting researchers to their presence.
La Silla Observatory
The Milky Way above the dome of the Danish 1.54-metre telescope at the European Southern Observatory's La Silla Observatory in Chile. This telescope was a major contributor to the PLANET project to search for exoplanets using microlensing.
CREDIT: ESO/Z. Bardon (www.bardon.cz)/ProjectSoft (www.projectsoft.cz) 














Studying millions of stars
In the new study, the researchers looked at data gathered by a variety of Earth-based telescopes, which scanned millions of stars from 2002 to 2007 for microlensing events.
The team closely analyzed about 40 of these events and discovered that three betrayed the presence of an alien planet around a star. One of these planets is a bit more massive than Jupiter, one is comparable to Neptune and the third is a so-called "super-Earth" with a mass about five times that of our home planet. [Gallery: Smallest Alien Planets Ever Seen]
Considering how perfectly aligned multiple bodies must be to yield an explanet detection via microlensing, that's a pretty impressive haul, researchers said.
The astronomers used all of this data, as well as information about seven additional planets detected by other microlensing efforts, to put a number on their planet-detection efficiency — and, by extension, the number of alien worlds that may populate the Milky Way.
The team determined that about one-sixth of our galaxy's stars harbor Jupiter-mass planets, half have Neptune-like worlds, and nearly two-thirds host super-Earths. And that's just in the stretch of orbital space from 0.5 to 10 astronomical units from each star, the limit of the study's sensitivity. (One astronomical unit, or AU, is the distance from Earth to the sun, about 93 million miles.)
"Moreover, we confirm that low-mass planets, such as super-Earths (up to 10 Earths) and Neptune-like planets are much more abundant than giant planets such as Saturn and Jupiter (with estimates that there are 6 to 7 times more low-mass than giant planets)," Cassan told SPACE.com in an email.
Further, according to the researchers' calculations, every star in the Milky Way harbors an average of 1.6 planets in the 0.5-10 AU range, which in our solar system corresponds roughly to the swath of space between Venus and Saturn.
Since astronomers estimate that our galaxy contains about 100 billion stars, that works out to at least 160 billion alien planets. A fair number of these alien worlds are likely to have two sunsets like the planet Tatooine in the "Star Wars" films; a separate study, also announced today, related the discovery of two exoplanets that orbit a pair of suns.
Cassan and his team report their results in the Jan. 12 issue of the journal Nature.
Planets bound and unbound
The true number of alien worlds may be quite a bit larger than 160 billion. Some planets hug their host stars more closely than 0.5 AU, after all, and others are more far-flung than 10 AU. And a great many likely have no host star at all.
Last year, a different team used microlensing observations to discover a huge population of Jupiter-like planets that zoom through space unbound to a parent star. These free-flying "rogues" likely outnumber "normal" alien worlds with obvious parent stars by at least 50 percent, according to the 2011 study.
"The two results obtained by microlensing show that planets are everywhere, and not only around stars," Cassan said.
For those of us clinging to the notion that Earth is special, these and a raft of other recent exoplanet discoveries may be tough to stomach.
"We used to think that the Earth might be unique in our galaxy," study co-author Daniel Kubas, also of the Paris Institute of Astrophysics, said in a statement. "But now it seems that there are literally billions of planets with masses similar to Earth orbiting stars in the Milky Way."
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