Video – Abby Martin takes a look at the 50-year long practice of water fluoridation in America, outlining various health effects and breaking the myth that this practice helps prevent tooth decay [...]
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Originally Posted at in5d.com The following is the alleged result of the actions of one or more scientists creating a covert, unauthorized notebook documenting their involvement with an Above Top Secret government program. Government publications and information obtained by the use of public tax monies cannot be subject to copyright. This document is released into the public domain for all citizens of the United States of America. THE ‘MAJIC PROJECTS’ SIGMA is the project whic [...]
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| Titan |
Studies may suggest methane-based organic processes ... but maybe not
New findings have roused a great deal of hoopla over the possibility of life on Saturn's moon Titan, which some news reports have further hyped up as hints of extraterrestrials.
However, scientists also caution that aliens might have nothing to do with these findings.All this excitement is rooted in analyses of chemical data returned by NASA's Cassini spacecraft. One study suggested that hydrogen was flowing down through Titan's atmosphere and disappearing at the surface. Astrobiologist Chris McKay at NASA's Ames Research Center speculated that this could be a tantalizing hint that hydrogen is getting consumed by life.
"It's the obvious gas for life to consume on Titan, similar to the way we consume oxygen on Earth," McKay said.
Another study investigating hydrocarbons on Titan's surface found a lack of acetylene, a compound that could be consumed as food by life that relies on liquid methane instead of liquid water to live.
"If these signs do turn out to be a sign of life, it would be doubly exciting because it would represent a second form of life independent from water-based life on Earth," McKay said.
However, NASA scientists caution that aliens might not be involved at all.
McKay told Space.com that "both results are still preliminary."
To date, methane-based life forms are only speculative, with McKay proposing a set of conditions necessary for these kinds of organisms on Titan in 2005. Scientists have not yet detected this form of life anywhere, although there are liquid-water-based microbes on Earth that thrive on methane or produce it as a waste product.
On Titan, where temperatures are around minus-290 degrees Fahrenheit (-179 degrees Celsius), any organisms would have to use a substance that is liquid as its medium for living processes. Water itself cannot do, because it is frozen solid on Titan's surface. The list of liquid candidates is very short — liquid methane and related molecules such as ethane. Previous studies have found Titan to have lakes of liquid methane.
Missing hydrogen?
The dearth of hydrogen Cassini detected is consistent with conditions that could produce methane-based life, but do not conclusively prove its existence, cautioned researcher Darrell Strobel, a Cassini interdisciplinary scientist based at Johns Hopkins University in Baltimore. Strobel wrote the paper on hydrogen appearing online in the journal Icarus.
Strobel looked at densities of hydrogen in different parts of the atmosphere and at the surface. Previous models from scientists had predicted that hydrogen molecules, a byproduct of ultraviolet sunlight breaking apart acetylene and methane molecules in the upper atmosphere, should be distributed fairly evenly throughout the atmospheric layers.
Strobel's computer simulations suggest a hydrogen flow down to the surface at a rate of about 10,000 trillion trillion molecules per second.
"It's as if you have a hose and you're squirting hydrogen onto the ground, but it's disappearing," Strobel said. "I didn't expect this result, because molecular hydrogen is extremely chemically inert in the atmosphere, very light and buoyant. It should 'float' to the top of the atmosphere and escape."
Strobel said it is not likely that hydrogen is being stored in a cave or underground space on Titan. An unknown mineral could be acting as a catalyst on Titan's surface to help convert hydrogen molecules and acetylene back to methane.
Although Allen commended Strobel, he noted "a more sophisticated model might be needed to look into what the flow of hydrogen is."
Consumed acetylene?
Scientists had expected the sun's interactions with chemicals in the atmosphere to produce acetylene that falls down to coat Titan's surface. But when Cassini mapped hydrocarbons on Titan's surface, it detected no acetylene on the surface, according to findings appearing online in the Journal of Geophysical Research.
Instead of alien life on Titan, Allen said one possibility is that sunlight or cosmic rays are transforming the acetylene in icy aerosols in the atmosphere into more complex molecules that would fall to the ground with no acetylene signature.
"Titan's atmospheric chemistry is cranking out organic compounds that rain down on the surface so fast that even as streams of liquid methane and ethane at the surface wash the organics off, the ice gets quickly covered again," said Roger Clark, a Cassini team scientist based at the U.S. Geological Survey in Denver. "All that implies Titan is a dynamic place where organic chemistry is happening now."
All this speculation "is jumping the gun, in my opinion," Allen said.
"Typically in the search for the existence of life, one looks for the presence of evidence -- say, the methane seen in the atmosphere of Mars, which can't be made by normal photochemical processes," Allen added. "Here we're talking about absence of evidence rather than presence of evidence — missing hydrogen and acetylene — and oftentimes there are many non-life processes that can explain why things are missing."
These findings are "still a long way from evidence of life," McKay said. "But it could be interesting."
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| The oldest samples are sedimentary rocks that formed 3.2 billion years ago in northwestern Australia. They contain chemical evidence for nitrogen fixation by microbes.R. Buick / UW |
Excerpt from
washington.edu
A spark from a lightning bolt, interstellar dust, or a subsea volcano could have triggered the very first life on Earth.
But what happened next? Life can exist without oxygen, but without plentiful nitrogen to build genes – essential to viruses, bacteria and all other organisms – life on the early Earth would have been scarce.
The ability to use atmospheric nitrogen to support more widespread life was thought to have appeared roughly 2 billion years ago. Now research from the University of Washington looking at some of the planet’s oldest rocks finds evidence that 3.2 billion years ago, life was already pulling nitrogen out of the air and converting it into a form that could support larger communities.
“People always had the idea that the really ancient biosphere was just tenuously clinging on to this inhospitable planet, and it wasn’t until the emergence of nitrogen fixation that suddenly the biosphere become large and robust and diverse,” said co-author Roger Buick, a UW professor of Earth and space sciences. “Our work shows that there was no nitrogen crisis on the early Earth, and therefore it could have supported a fairly large and diverse biosphere.”
The results were published Feb. 16 in Nature.
The authors analyzed 52 samples ranging in age from 2.75 to 3.2 billion years old, collected in South Africa and northwestern Australia. These are some of the oldest and best-preserved rocks on the planet. The rocks were formed from sediment deposited on continental margins, so are free of chemical irregularities that would occur near a subsea volcano. They also formed before the atmosphere gained oxygen, roughly 2.3 to 2.4 billion years ago, and so preserve chemical clues that have disappeared in modern rocks.
Even the oldest samples, 3.2 billion years old – three-quarters of the way back to the birth of the planet – showed chemical evidence that life was pulling nitrogen out of the air. The ratio of heavier to lighter nitrogen atoms fits the pattern of nitrogen-fixing enzymes contained in single-celled organisms, and does not match any chemical reactions that occur in the absence of life.
“Imagining that this really complicated process is so old, and has operated in the same way for 3.2 billion years, I think is fascinating,” said lead author Eva Stüeken, who did the work as part of her UW doctoral research. “It suggests that these really complicated enzymes apparently formed really early, so maybe it’s not so difficult for these enzymes to evolve.”
Genetic analysis of nitrogen-fixing enzymes have placed their origin at between 1.5 and 2.2 billion years ago.
“This is hard evidence that pushes it back a further billion years,” Buick said.
Fixing nitrogen means breaking a tenacious triple bond that holds nitrogen atoms in pairs in the atmosphere and joining a single nitrogen to a molecule that is easier for living things to use. The chemical signature of the rocks suggests that nitrogen was being broken by an enzyme based on molybdenum, the most common of the three types of nitrogen-fixing enzymes that exist now.
Molybdenum is now abundant because oxygen reacts with rocks to wash it into the ocean, but its source on the ancient Earth – before the atmosphere contained oxygen to weather rocks – is more mysterious.
The authors hypothesize that this may be further evidence that some early life may have existed in single-celled layers on land, exhaling small amounts of oxygen that reacted with the rock to release molybdenum to the water.
“We’ll never find any direct evidence of land scum one cell thick, but this might be giving us indirect evidence that the land was inhabited,” Buick said. “Microbes could have crawled out of the ocean and lived in a slime layer on the rocks on land, even before 3.2 billion years ago.”
Future work will look at what else could have limited the growth of life on the early Earth. Stüeken has begun a UW postdoctoral position funded by NASA to look at trace metals such as zinc, copper and cobalt to see if one of them controlled the growth of ancient life.
Other co-authors are Bradley Guy at the University of Johannesburg in South Africa, who provided some samples from gold mines, and UW graduate student Matthew Koehler. The research was funded by NASA, the UW’s Virtual Planetary Laboratory, the Geological Society of America and the Agouron Institute.
Excerpt from huffingtonpost.comIn early December, NASA will take an important step into the future with the first flight test of the Orion spacecraft -- the first vehicle in history capable of taking humans to multiple destinations in deep space. An...
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| The Virgin Galactic Two Spaceship |
news.com.au
THE pilot who miraculously survived the Virgin spaceship disaster has revealed how he was blasted from the wreckage of the disintegrating rocket ship and plummeted nearly ten miles back to Earth.
Having suffered serious injuries, the experienced test pilot only regained consciousness halfway into his fall but was composed enough to give a thumbs-up to colleagues in a passing aircraft to show he was alive.
Peter Siebold spoke for the first time about the tragedy that killed his close friend, copilot Mike Alsbury, revealing he blacked out as the craft broke up around him at 50,000ft but was saved by his emergency parachute.
Siebold, 43, a married father of two, said: “I must have lost consciousness at first. I can’t remember anything about what happened but I must have come to during the fall. I remember waving to the chase plane and giving them the thumbs-up to tell them I was OK. I know it’s a miracle I survived.”
Perished ... Mike Alsbury was a close friend and colleague of Peter Siebold. Source: AP
Survivor ... Peter Siebold can’t remember much of what happened that day. Source: AP
Explosion ... These three images show the space craft’s demise. Source: AP
Then disaster occurred. Preliminary investigations suggest that the rocket ship’s folding wings — designed to slow it down and achieve safe speeds during landing — deployed early, causing the ship to break up due to the tremendous turbulence around the craft.
Alsbury was trapped in the cockpit but Siebold was thrown clear of the wreckage or somehow unbuckled his seatbelt. He then plunged towards Earth at speeds topping 193km/h. Witnesses reported seeing Siebold descending with part of the base of his seat still attached. It is likely that his oxygen mask, attached to a portable tank, remained in place. But at that altitude, the sudden decompression and extreme G-forces would have caused him to black out in seconds.
His emergency parachute deployed t about 20,000ft. It is not known if he pulled the cord or if it unfurled automatically. Both pilots were wearing parachutes calibrated to open automatically at a certain height in the event they became unconscious during an emergency.
Incredible ... Siebold has no idea how he managed to exit the space ship, given it has no ejection seat. Source: AFP
The body of Alsbury, 39, was found still strapped into his seat on a desert road by construction workers. His parachute did not deploy. His wife Michelle said she had “lost the love of my life”.
Mike, second from right, was a friend and neighbour of Siebold. Source: Supplied
Big sky dreaming ... Sir Richard Branson vowed to become an astronaut by the end of the year. Source: AP
The investigation into this month’s crash is now likely to delay any commercial flight for at least another year. But Branson has vowed to press ahead with the project, while acknowledging the risks taken by his test pilots. Last night, Mr Whitesides paid tribute to Siebold, saying: “It will be regarded as one of the most amazing test flight survival stories of all time.”
Additional reporting by Peter Sheridan
Enlightenment. The moment we consciously connect to eternal truth. It’s when we see through the veil of this illusionary world, rising above ego, time, materialism, and our own emotions to see the bigger picture—that we are all one. It’s what all gurus, spiritualists, yogis, Buddhists, monks, meditators, shamans, artists, writers, and religious leaders strive for. It’s the state Neo reached at the end of The Matrix, the level Dorothy attained so she could surpa [...]
What we participate in is pretty much the name of the game. What do we spend our time, energy and intention on? What are we consciously and/or subconsciously empowering that’s leading to our own dis-empowerment? Where attention and thus intention goes, energy flows. Where is ours going, collectively and individually? Something to seriously consider on a continual basis in this massively manipulated energetic world.I’ve been blown away recently by the rapid rise in consciousness [...]
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Breaking: U.S. plane with 2 people aboard goes down in Bermuda Triangle after unresponsive flight ~ September 5th, 2014
Flight path of the plane after leaving Rochester, New Yorkusatoday.comA plane belonging to a New York state developer with (two) people aboard has crashed in the ocean north of Jamaica after flying unresponsive for hours and being escorted by U.S. fi...
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