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Old 05-21-2012, 10:43 PM  
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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.

This is in support of the Penny 4 NASA project. If you enjoy anything you learned from this thread, consider making a donation and signing the petition.

http://www.penny4nasa.org/

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Last edited by Fish; 01-07-2013 at 08:55 AM..
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Old 11-14-2014, 07:33 PM   #2026
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The science of Fish piss.... chicks dig it........

Behold: The Majestic Power of Tilapia Urine

The secret to successful tilapia farming? Why, golden showers of course – why are you even asking?

A new study from the Centre of Marine Sciences at the University of Algarve in Portugal found that dominant tilapia males produce large quantities of pheromones in their urine that attract greater female attention, thus producing more babies and, ultimately, more fish tacos.

In spawning as in life, it all comes down to a pissing contest. The male tilapia, you see, is a competitive sort, especially when it comes to the mating game. When prepping for reproduction, the men first build a little spawning nest.

“It’s actually a quite interesting fish, because tilapias are highly social animals, so the males form hierarchies in a so-called spawning arena,” study leader Tina Keller-Costa told National Geographic.

What does that mean, exactly? Well, they start peeing. A lot. And it turns out that the more dominant males secrete greater amounts of a pheromone resembling a progesterone steroid, which the females totally dig. Before Gen Z is even a tinkle in her eye, she’s making a beeline (peeline?) for the alpha male and ignoring the piss-poor dude entirely.

Don’t start your lunch quite yet, because there’s more. The research team also found that the alpha males had bigger bladders, which meant not only more urine but more muscle control, allowing them to fire at will.

“They can extend the bladder, and that enables them to hold on to larger urine quantities. When they’re facing a female or when they’re facing a competitor, they’re literally, actively squeezing it all out,” said Keller-Costa. (We told you to put down that sandwich.)

So what does this have to do with tilapia farming? Well, the little pisser is the second most farmed fish in the world (the merits and drawbacks of which we’ll leave for another day). But it’s also become a dangerous invasive, easily able to elude its confines and make its way into the freshwater wilds. If the pee power of the male can be properly harnessed, it could be used to bring escape-minded females back into the farm fold.

“If we can use this pheromone that we identified to attract females into traps, [for instance, we can] see if we can in the future control these invasive populations,” Keller-Costa told the magazine.
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Old 11-14-2014, 10:29 PM   #2027
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First segment on interesting interaction of 'steampunk' early tech and some of the most cutting edge tech of today.
I can't tell you how much I enjoyed that whole video series. As a kid, I was fascinated by Rube Goldberg devices and while this device has the appearance of one, it is actually an incredibly efficient machine for some very important math before the advent of computers. The whole design of the machine was in perfect harmony with its purpose. It is the perfect combination of imagination and common sense. Personally, it was especially cool since we do a fair amount of Fourier analysis and simulation in our research on noise biology.

The math described by this machine is the same math used to compress electronic signals in MP3s and is the same math embedded in living systems. It is just a thing of beauty.
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Old 11-15-2014, 06:46 PM   #2028
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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 11-19-2014, 10:54 AM   #2029
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Did you know that Uranus was once named George?



Ancient people didn't have TV or electric lights. So, when the sun went down every night, they got their entertainment by watching the sky. And it was entertaining. Without city lights to interfere, the Milky Way was spectacular. Meteors flitted across the sky. Zodiacal lights chased the sunset.

Of special interest were the five naked-eye planets, the ones you could see without a telescope. (The ancients didn't have telescopes, either.) Countless hours were spent watching Mercury, Venus, Mars, Jupiter and Saturn, whose movements were thought to control the affairs of men.

Would you believe, in spite of all that watching, they missed one? There is a sixth planet you can see without a telescope, a planet named George.

"George" is not as bright as the others, but it is there, glowing like an aqua-blue star of 6th magnitude. It measures four times wider than Earth, has more than 30 moons and a dozen or so thin rings. George goes around the sun every 84 years, always spinning on its side as if something knocked it over.
George is better known as Uranus.

English astronomer William Herschel discovered the planet in 1781 during a telescopic survey of the zodiac. He promptly named it the Georgium Sidus (the Georgian Planet) in honor of his patron, King George III. Later, to the everlasting delight of schoolchildren, George was re-named Uranus, the Greek god of the sky.

Uranus had been seen many times before but mistaken for a star. The earliest recorded sighting was in 1690 when astronomer John Flamsteed cataloged it as 34 Tauri, the 34th star of Taurus the Bull. We can understand the error. Uranus is so far from the sun it looks like a star to the unaided eye. And it moves so slowly; you have to watch for decades to realize that it is a wanderer—or, in ancient Greek, a planētēs.

In modern times, Uranus has become all but impossible to see. The planet is naturally faint, and urban lights wipe it out completely. No one notices when Uranus soars overhead.

http://science.nasa.gov/science-news.../11apr_george/
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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 11-19-2014, 11:00 AM   #2030
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One simple kiss transfers 80 million bacteria. Blech...



One kiss 'shares 80 million bugs'

A single 10-second kiss can transfer as many as 80 million bacteria, according to Dutch scientists.

They monitored the kissing behaviour of 21 couples and found those who kissed nine times a day were most likely to share salivary bugs.

Studies suggest the mouth is home to more than 700 different types of bacteria
- but the report reveals some are exchanged more easily than others.

The research is published in the journal Microbiome.


Locked lips
A team from the Netherlands Organisation for Applied Scientific Research (TNO) asked 21 couples a series of questions to assess their kissing habits, including how frequently they had kissed in the last year and when they last locked lips.

Scientists took bacterial samples from the volunteers' tongues and saliva before and after a strictly timed 10-second kiss.

One member of the couple then drank a probiotic drink, containing an easily identifiable mixture of bugs.

On the couple's second kiss, scientists were able to detect the volume of bacteria transferred to the other partner - on average 80 million bacteria in a single 10-second kiss.

But while bacteria in the saliva seemed to change quickly in response to a kiss, bug populations on the tongue remained more stable.
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Old 11-19-2014, 11:18 AM   #2031
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So... scientists are pretty confident that there are 2 additional planetoids way out past Pluto. One of them is larger than Earth. No word on lizard inhabitants...

Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets

The existence of an outer planet beyond Pluto has been a matter of debate for decades and the recent discovery of 2012 VP113 has just revived the interest for this controversial topic. This Sedna-like object has the most distant perihelion of any known minor planet and the value of its argument of perihelion is close to 0°. This property appears to be shared by almost all known asteroids with semimajor axis greater than 150 au and perihelion greater than 30 au (the extreme trans-Neptunian objects or ETNOs), and this fact has been interpreted as evidence for the existence of a super-Earth at 250 au. In this scenario, a population of stable asteroids may be shepherded by a distant, undiscovered planet larger than the Earth that keeps the value of their argument of perihelion librating around 0° as a result of the Kozai mechanism. Here, we study the visibility of these ETNOs and confirm that the observed excess of objects reaching perihelion near the ascending node cannot be explained in terms of any observational biases. This excess must be a true feature of this population and its possible origin is explored in the framework of the Kozai effect. The analysis of several possible scenarios strongly suggest that at least two trans-Plutonian planets must exist.
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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 11-19-2014, 11:22 AM   #2032
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stopped eating tilapia a while ago, disgusting trash fish
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Old 11-19-2014, 11:39 AM   #2033
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Fish sought out picture chosen to accompany kiss/bacteria article


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