If anybody remembers
where it started, please let me know I believe I left my umbrella there,
Jack
p.s. Sheldan's Interview @1pm PST
----- Original Message -----
To: galacticjack
Sent: Wednesday, April 17, 2013 5:27
PM
Subject: Could Life Be Older
Than Earth Itself?
Greetings from Galactic Heart . . .
Below is an article entitled "Could Life Be Older Than Earth
Itself?" Sheldan and I had to laugh. These scientists should read Sheldan's
book, Your First
Contact. That would steer them in the right
direction. We were happy that they are exploring the possibility that humans did
not originate on Earth but also found some of their hypotheses amuzing. Enjoy
the article.
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Selamat
Ja!
Colleen
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COULD LIFE BE OLDER THAN EARTH ITSELF?
By Jillian Scharr, TechNewsDaily Staff Writer |
LiveScience.com
Applying a maxim from computer science to biology raises the
intriguing possibility that life existed before Earth did and may have
originated outside our solar system, scientists say.
Moore's Law is the observation that computers increase
exponentially in complexity, at a rate of about double the transistors per
integrated circuit every two years. If you apply Moore's Law to just the last
few years' rate of computational complexity and work backward, you'll get back
to the 1960s, when the first microchip was, indeed, invented.
Now, two geneticists have applied Moore's Law to the rate at
which life on Earth grows in complexity — and the results suggest organic life
first came into existence long before Earth
itself.
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Staff Scientist Alexei Sharov of the National Institute on Aging
in Baltimore, and Theoretical Biologist Richard Gordon of the Gulf Specimen
Marine Laboratory in Florida, took Moore's Law, replaced the transistors with
nucleotides — the building blocks of DNA and RNA — and the circuits with genetic
material, and did the math.
The results suggest life first appeared about 10 billion years
ago, far older than the Earth's projected age of 4.5 billion years.
So even if it's mathematically possible for life to have existed
before Earth did, is it physically possible? Again, Sharov and Gordon said yes,
it is. As our solar system was forming, pre-existing bacterialike organisms, or
even simple nucleotides from an older part of the galaxy, could have reached
Earth by hitching an interstellar ride on comets, asteroids or other inorganic
space debris — a theoretical process called panspermia.
The scientists' calculations are not scientific proof that life
predates Earth — there's no way of knowing for sure that organic complexity
increased at a steady rate at any point in the universe's history. Call it a
thought exercise or an essay, rather than a theory, Sharov said.
"There are lots of hypothetical elements to [our argument]… but
to make a wider view, you need some hypothetical elements," Sharov told
TechNewsDaily.
Sharov and Gordon's idea raises other intriguing possibilities.
For one, "life before earth" debunks the long-held science-fiction trope of the
scientifically advanced alien species. If genetic complexity progresses at a
steady rate, then the social and scientific development of any other alien life
form in the Milky Way galaxy would be roughly equivalent to those of
humans.
Sharov and Gordon's study draws a theoretical and practical
parallel between the origin of life and the relationship between life and
knowledge. Human evolution doesn't just occur in the genome; it occurs
epigenetically, or within the mind, as technology, language and cultural memory
all become more complex. "The functional complexity of organisms [is] encoded
partially in the heritable genome and partially in the perishable mind," they
explain in the paper.
By applying Moore's Law — a theory originally devised to explain
technological development — to life, the geneticists aren't simplifying
evolution; they're acknowledging its extraordinary complexity, they
say.
Although some may be skeptical of Sharov and Gordon's findings,
the scientists stand by their conclusions. "Contamination with bacterial spores
from space appears the most plausible hypothesis that explains the early
appearance of life on Earth," they argue in the paper, which is published online
in the preprint journal Arxiv.
Sharov said that if he had to bet on it, he'd say "it's 99
percent true that life started before Earth — but we should leave 1 percent for
some wild chance that we haven't accounted for."
Could Life Be Older
Than Earth Itself?
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