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Old 05-21-2012, 09:43 PM  
Fish Fish is offline
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Science is Cool....

This is a repository for all cool scientific discussion and fascination. Scientific facts, theories, and overall cool scientific stuff that you'd like to share with others. Stuff that makes you smile and wonder at the amazing shit going on around us, that most people don't notice.

Post pictures, vidoes, stories, or links. Ask questions. Share science.

Why should I care?:


Last edited by Fish; 05-05-2021 at 11:19 PM..
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Old 03-09-2013, 04:33 PM   #646
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Hmm. That's a tough question. I have a great fondness for bears. At this point I can only state tartigrade ≠ bear.
Well they do call the tardigrade a "water bear" so your argument is sort of moot.
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Old 03-09-2013, 05:05 PM   #647
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This thing looks like a bad sewing job from middle school home economics.
I swear I saw it in the Star Wars Cantina
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Old 03-11-2013, 11:46 AM   #648
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http://news.yahoo.com/extraterrestri...145506511.html

Extraterrestrial Life May be Common Around Binary Stars


Planets orbiting binary star systems have to deal with the stresses of more than one star. But new research reveals that close binaries could be as good as singles when it comes to hosting habitable planets. Low-mass twins could make the best hosts, because their combined energy extends the habitable region farther away than would exist around a single star.

After modeling a variety of binary systems, two astronomers determined that stars 80 percent as massive as the Sun, if close enough together, could allow for conditions that would be ideal for hosting habitable planets.

"Potentially, life could exist even more in binary systems than it does in single systems," Joni Clark, an undergraduate at New Mexico State University, told Astrobiology Magazine. Clark worked with astrophysicist Paul Mason of the University of Texas at El Paso.

Pushing the boundaries

Low-mass stars are two to three times more common than the Sun. Their sheer numbers may give them greater odds for hosting planets. But their smaller size also means they have more ultraviolet radiation early in the life of the star and dangerous solar winds in the habitable zone, both important when it comes to maintaining a niche for life to exist. Planets must lie extremely close to small single stars to reap the benefits, a position that brings a number of challenges. Such planets are more prone to be tidally locked, with one face permanently turned toward its sun, and to receive the brunt of any stellar activity. [9 Exoplanets That Could Host Alien Life]

But when two such stars are closely paired, their combined energy extends the habitable region farther away and makes it larger, minimizing some of the threats faced by planets orbiting low-mass stars.

"We have much more room here for planets to hang out," Clark said.

Not just any binary system will work, however. Habitable zones receive the best effect when the low-mass stars are close together, circling each other every ten days or less. Radiation of all types coming from two such closely bound stars would be more consistent, and the planets orbiting them would resemble that of a planet orbiting a single star.

But when the stars are farther apart, the planet's orbit is more likely to be unstable as it feels the tug of gravity stronger from first one star and then the other. When stars are spread out over a distance, orbiting planets would experience significant changes in temperature. With a large enough gap, planets would travel around only one star, with the possibility of occasionally entering the danger zone of the other.

"There are many regions around binary star systems where having a stable orbit simply isn't possible," said Stephen Kane, of the California Institute of Technology. Kane, who studies the habitable zones of planets orbiting binary stars, was not involved in Clark and Mason's research.

Living conditions

Living conditions on the planets would vary based on cloud cover, which could help to both insulate the planet and shelter it from ultraviolet radiation. Such cloud cover could help to protect the planet from the changes it would encounter as it orbits closer first to one star and then to the other.

"How the temperature at the surface of the planet will vary depends on the properties of the atmosphere and its ability to absorb this flux and temperature variation," Kane said.

Clark and Mason simulated a number of close binary systems, calculating the temperatures and radiation that could exist for planets in orbit over the lifetime of the star. They presented their results at the American Astronomical Society meeting in January. After factoring in cloud cover and flux from the stars, they determined that the steadiest situations would come from binary twins, stars of approximately the same mass. Of these, a pair of stars 80 percent as massive as the Sun would hit what Clark called "the sweet spot," though a range of twins and other special combinations would also work well.

For close twin stars, "because they're similar masses and so close, it is very likely that they were, if you will, born at the same time," Clark said.

Such stars would have similar lifetimes, dying out in approximately the same time frame, but have a habitable zone 40 percent farther away than the single star counterparts. In the case of the lower-mass stars, such periods could far supersede the Sun's lifetime, lasting as long as twenty billion years.

"Other groups have recently shown that planets close to stars of any type suffer water loss, like Venus, and atmosphere erosion, mostly early in the star’s life. These effects may occur even for planets with magnetic field protection," Mason said. "The beauty of close binaries is that their habitable zones are located farther out."

Tatooine system

Kepler-47 provides a different system with fascinating properties. Instead of twins, the famous "Tatooine" system contains one star as massive as the Sun, and another only a third the size. A single planet orbits in the habitable zone, though it is too massive to be considered a good candidate for life. Eventually, the larger star will suffer the same fate as our Sun, swelling up into a massive red giant and changing the survivability for the planets orbiting the pair. The smaller star would live on, scant comfort for the planets that saw their habitable regions shift. Still, over the lifetime of the more massive star, the smaller star would provide extra light and heat that could be a bonus to potential life. [How 2 'Tatooine' Planets Orbit Twin Stars (Infographic)]

Because low-mass stars are so pervasive, and because most stars in the galaxy are locked in binary pairs, the chances of finding close, low-mass binaries is high, according to Clark and Mason. Though they caution that they haven't run the exact numbers, Mason says that such systems would be "not uncommon at all," potentially ranking such pairings as numerous as Sun-like single stars.

"I can imagine that a 0.8 solar mass binary, with a separation of less than a tenth of an astronomical unit [the distance from the Earth to the Sun], would have many possibilities of stable orbits within the habitable zone," Kane said.
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Old 03-12-2013, 03:31 PM   #649
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http://mashable.com/2013/03/11/veti-gel/

College Student Creates Gel to Stop Bleeding Instantly

Camille Bautista1 day ago
In alternate realities like Mass Effect's video game galaxy or Suzanne Collins' The Hunger Games, all-purpose medicinal salves serve as a rapid cure-all for any ailment or injury.

Joe Landolina, a student at the Polytechnic Institute of New York University, is one step closer to bringing this medical cure to market. Landolina created Veti-Gel, a substance that closes up wounds to major arteries or organs to immediately stop bleeding.

The product uses genetically modified plants and can be stored at temperatures from 33 to 90 degrees Fahrenheit. Check out the video, above, to see how it works.

It's a synthetic form of the extracellular matrix, or ECM, a part of body tissue that holds cells together and activates the clotting process. When a part of the body is injured, Veti-Gel binds to the ECM to form a cover that mimics skin and eliminates the need to apply pressure to the wound, reports TechNewsDaily.

While there are other products designed to quickly heal wounds, such as QuikClot, a clotting gauze used by the military, they require several minutes of pressure.

Veti-Gel can be used for both external and internal bleeding as well as severe burns, plus, it works in an instant. Landolina is looking to test out the substance in the veterinary field and ultimately get FDA approval.

What do you think of the healing gel? Let us know your thoughts in the comments.
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Old 03-12-2013, 03:50 PM   #650
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Quote:
Originally Posted by Dave Lane View Post
Well they do call the tardigrade a "water bear" so your argument is sort of moot.
True, I could just think of them as tiny little bad ass bears.
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Old 03-15-2013, 10:06 PM   #651
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Old 03-15-2013, 10:09 PM   #652
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So we're pretty much even more sure that we've found the Higgs Bosson..


Physicists Say They Have Found a Higgs Boson
By THE ASSOCIATED PRESS
Published: March 14, 2013 at 4:34 PM ET

GENEVA (AP) — It helps solve one of the most fundamental riddles of the universe: how the Big Bang created something out of nothing 13.7 billion years ago.

In what could go down as one of the great Eureka! moments in physics — and win somebody the Nobel Prize — scientists said Thursday that after a half-century quest, they are confident they have found a Higgs boson, the elusive subatomic speck sometimes called the "God particle."

The existence of the particle was theorized in 1964 by the British physicist Peter Higgs to explain why matter has mass. Scientists believe the particle acts like molasses or snow: When other tiny basic building blocks pass through it, they stick together, slow down and form atoms.

Scientists at CERN, the Geneva-based European Organization for Nuclear Research, announced in July that they had found something that looked like the Higgs boson, but they weren't certain, and they needed to go through the data and rule out the possibility it wasn't something else.

On Thursday, they said they believe they got it right.

"To me it is clear that we are dealing with a Higgs boson, though we still have a long way to go to know what kind of Higgs boson it is," said Joe Incandela, a physicist who heads one of the two main teams at CERN, each involving about 3,000 scientists.

Whether or not it was a Higgs boson had to be demonstrated by how it interacts with other particles and its quantum properties, CERN said. The data "strongly indicates that it is a Higgs boson," it said.

The discovery explains what once seemed unexplainable and still is a bit hard for the average person to comprehend. But it means the key theory that scientists use to explain everything works — for now, at least.

Its discovery could be a strong contender for the Nobel, though it is uncertain whether the prize would go to the 83-year-old Peter Higgs and the others who first proposed the theory, or to the thousands of scientists who found it, or to all of them.

Finding it wasn't easy. It took more than two decades, thousands of scientists and mountains of data from trillions of colliding protons.

And it needed the world's biggest atom smasher — CERN's Large Hadron Collider, which cost $10 billion to build and run in a 17-mile (27-kilometer) tunnel beneath the Swiss-French border — to produce the extreme surge of energies simulating those 1 trillionth to 2 trillionths of a second after the Big Bang.

The Higgs boson is so elusive that only about one collision per trillion will produce one of them in the collider.

CERN said it is open question whether this is the Higgs boson that was expected in the original formulation, or the lightest of several Higgses predicted in some theories that go beyond that model.

"We found a new particle and we want to know how it behaves, and maybe it behaves the way it was predicted in 1964, maybe it's a little bit different," said physicist Sean Carroll of the California Institute of Technology, who isn't involved in the research.

Finding a Higgs more or less as expected is actually a bit deflating, Carroll said, because physicists had also hoped that an unexpected type of Higgs might open windows into yet more mysteries of the universe.

"Scientists always want to be wrong in their theories. They always want to be surprised," he said. "It's a bittersweet victory when your theory turns out to be right, because it means, on the one hand, you're right, that's nice, but on the other hand, you haven't learned anything new that's surprising."

Some of the remaining mysteries including why gravity is so weak and what is the dark matter that is believed to make up a large part of the total mass in the universe, said Patty McBride, who heads a center at the Fermilab in Chicago.
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Old 03-15-2013, 10:09 PM   #653
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Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.Fish is obviously part of the inner Circle.
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Old 03-16-2013, 07:41 AM   #654
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Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.Dave Lane is obviously part of the inner Circle.
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Old 03-16-2013, 11:11 AM   #655
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Old 03-16-2013, 12:37 PM   #656
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Thats pretty frikken cool
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Old 03-17-2013, 05:14 PM   #657
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"Yeah, yeah, but your scientists were so preoccupied with whether or not they could that they didn't stop to think if they should."

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Old 03-17-2013, 06:26 PM   #658
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Just don't bring back velociraptors..

Or any insects larger than the ones we see today.

Or Megalodon.

Or Neanderthals. That could be weird.
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Old 03-17-2013, 06:29 PM   #659
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"Yeah, yeah, but your scientists were so preoccupied with whether or not they could that they didn't stop to think if they should."

Oh yes, they should.
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Old 03-17-2013, 06:52 PM   #660
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They say if you wrap your house in like a 1/4 or 1/8 inch of this stuff, you could heat your home with a candle.
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