From TFW(ebsite):
Dusty grains - including tiny specks of the minerals found in the gemstones peridot, sapphires and rubies - can be seen blowing in the winds of a quasar, or active black hole, in this artist's concept. The quasar is at the center of a distant galaxy.
Astronomers using NASA's Spitzer Space Telescope found evidence that such quasar winds might have forged these dusty particles in the very early universe. The findings are another clue in an ongoing cosmic mystery: where did all the dust in our young universe come from?
Dust is crucial for efficient star formation as it allows the giant clouds where stars are born to cool quickly and collapse into new stars. Once a star has formed, dust is also needed to make planets and living creatures. Dust has been seen as far back as when the universe was less than a tenth of its current age, but how did it get there? Most dust in our current epoch forms in the winds of evolved stars that did not exist when the universe was young.
Theorists had predicted that winds from quasars growing in the centers of distant galaxies might be a source of this dust. While the environment close to a quasar is too hot for large molecules like dust grains to survive, dust has been found in the cooler, outer regions. Astronomers now have evidence that dust is created in these outer winds.
Using Spitzer's infrared spectrograph instrument, scientists found a wealth of dust grains in a quasar called PG2112+059 located at the center of a galaxy 8 billion light-years away. The grains - including corundum (sapphires and rubies); forsterite (peridot); and periclase (naturally occurring in marble) - are not typically found in galaxies without quasars, suggesting they might have been freshly formed in the quasar's winds. So the question that follows is; how were these dust-creating quasar formed in a dustless universe?
That "did" you emphasize doesn't mean the statement is not true now. As I understand it, the x-rays are reaching our telescopes now with a 9-11 billion light-year delay. We are seeing these quasars in their infancy/reaching maturity. We can only make assumptions about their status today.
Assuming alliterations are always apparent admits absence of afterthought. Actually, alliteration appertains to consonants alone. Alternatively, the aforementioned abstract is an archetypal assonance
Could anyone explain to me how are online social networks any different, legally, to cell phone networks, email providers or even the postal system when it comes to pedophilia? Aren't they simply providing communication services? Aren't all of those used by pedophiles? is it because of the amount of public exposure given to any person in, say MySpace? Is it the websites' ability to keep logs and data of the exchanges?
Re:So if the this is completely free of charge....
on
1-800-Google Launches
·
· Score: 1
Well, the way I understand it, businesses would pay to be the first on the list. I'm sure than in any given suburb/city/whatever there will be more than 1 cafe, more than 1 pizza delivery. A list will ALL those businesses wouldn't fit in one SMS, or one hundred, so how does Google know which ones to send/show? Money from those businesses!
> So I think its more correct to say that it's HIV to fight HIV-using a HIV modified virus to stimulate the immune system against HIV.
Yes, and at the same time, no; from the article, I gather that this new virus doesnt stimulate the immune system directly- it acts as some sort of flag or filter. It is engineered so that the two strains of HIV can coexist in the same "infected" cell. In a normal HIV-infected cell, the genetic code is replaced by the virus', and the cell starts producing more copies of the virus until it dies. With this modified HIV, the genetic code is still replaced, but the cells produced are HIV-free. That is what lets the immune system rebuild itself, its not the actual virus that helps it.
so basicly, if they found another dolphin with similar characteristics and make them breed, and the same with their offspring, and again and again, you could force them to "evolve"? Gosh, we humans are pretty demented
What makes scientists so sure that this is a malformation, a "remain from the past" as he put it, instead of a genetical change in dolphins in general, which could be evolution?
TFA says that "Whale and dolphin fetuses also show signs of hind protrusions but these generally disappear before birth", couldn't this mean that the species have been changing for years and years, and this specimen is the first to show more developed fins/legs?
I just want to know how they differentiate something that's genetically deformed (meaning it affects only the specimen, and not the species) to something that's evolving.
Chemistry, and high school is more than enough. We studied fullerenes in the first year of senior high school.Its not that hard. I thought hackers and nerds were reknowned for their thirst for knowledge; http://en.wikipedia.org/wiki/Fullerenes C'mon; you couldn't even be bothered to look it up in wikipedia?
Slashdot Mirror
Astronomers using NASA's Spitzer Space Telescope found evidence that such quasar winds might have forged these dusty particles in the very early universe. The findings are another clue in an ongoing cosmic mystery: where did all the dust in our young universe come from?
Dust is crucial for efficient star formation as it allows the giant clouds where stars are born to cool quickly and collapse into new stars. Once a star has formed, dust is also needed to make planets and living creatures. Dust has been seen as far back as when the universe was less than a tenth of its current age, but how did it get there? Most dust in our current epoch forms in the winds of evolved stars that did not exist when the universe was young.
Theorists had predicted that winds from quasars growing in the centers of distant galaxies might be a source of this dust. While the environment close to a quasar is too hot for large molecules like dust grains to survive, dust has been found in the cooler, outer regions. Astronomers now have evidence that dust is created in these outer winds.
Using Spitzer's infrared spectrograph instrument, scientists found a wealth of dust grains in a quasar called PG2112+059 located at the center of a galaxy 8 billion light-years away. The grains - including corundum (sapphires and rubies); forsterite (peridot); and periclase (naturally occurring in marble) - are not typically found in galaxies without quasars, suggesting they might have been freshly formed in the quasar's winds. So the question that follows is; how were these dust-creating quasar formed in a dustless universe?
That "did" you emphasize doesn't mean the statement is not true now.
As I understand it, the x-rays are reaching our telescopes now with a 9-11 billion light-year delay. We are seeing these quasars in their infancy/reaching maturity. We can only make assumptions about their status today.
http://www.google.com.au/search?q=define%3Aalliteration Most sources disagree with you.
Couldn't that be the result of a more aware media?
Could anyone explain to me how are online social networks any different, legally, to cell phone networks, email providers or even the postal system when it comes to pedophilia? Aren't they simply providing communication services? Aren't all of those used by pedophiles? is it because of the amount of public exposure given to any person in, say MySpace? Is it the websites' ability to keep logs and data of the exchanges?
Well, the way I understand it, businesses would pay to be the first on the list. I'm sure than in any given suburb/city/whatever there will be more than 1 cafe, more than 1 pizza delivery. A list will ALL those businesses wouldn't fit in one SMS, or one hundred, so how does Google know which ones to send/show? Money from those businesses!
> So I think its more correct to say that it's HIV to fight HIV-using a HIV modified virus to stimulate the immune system against HIV. Yes, and at the same time, no; from the article, I gather that this new virus doesnt stimulate the immune system directly- it acts as some sort of flag or filter. It is engineered so that the two strains of HIV can coexist in the same "infected" cell. In a normal HIV-infected cell, the genetic code is replaced by the virus', and the cell starts producing more copies of the virus until it dies. With this modified HIV, the genetic code is still replaced, but the cells produced are HIV-free. That is what lets the immune system rebuild itself, its not the actual virus that helps it.
...then why think about it at all?
so basicly, if they found another dolphin with similar characteristics and make them breed, and the same with their offspring, and again and again, you could force them to "evolve"? Gosh, we humans are pretty demented
What makes scientists so sure that this is a malformation, a "remain from the past" as he put it, instead of a genetical change in dolphins in general, which could be evolution? TFA says that "Whale and dolphin fetuses also show signs of hind protrusions but these generally disappear before birth", couldn't this mean that the species have been changing for years and years, and this specimen is the first to show more developed fins/legs? I just want to know how they differentiate something that's genetically deformed (meaning it affects only the specimen, and not the species) to something that's evolving.
Chemistry, and high school is more than enough. We studied fullerenes in the first year of senior high school.Its not that hard.
I thought hackers and nerds were reknowned for their thirst for knowledge; http://en.wikipedia.org/wiki/Fullerenes
C'mon; you couldn't even be bothered to look it up in wikipedia?