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filter
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century
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too
there
there
were
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based
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hence
ever
ever
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unique
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flares
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posits
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empty
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might
hit
hit
enough
enough
just
just
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in a galaxy far far away
worth it
worth it
humans
humans
problem
problem
peter
peter
dead
dead
like
like
great
great
what if
what if
really
really
popular
popular
more
more
mass extinction
mass extinction
road
road
solar flares
solar flares
bottleneck
bottleneck
systems
systems
events
events
study
study
hypothesis
hypothesis
for
for
chopra
chopra
five
five
trillion
trillion
scale
scale
asteroids
asteroids
born
born
what
what
killer
killer
the time
the time
now
now
solar
solar
aditya chopra
aditya chopra
life as we know it
life as we know it
they
they
make
make
rare earth
rare earth
first
first
all
all
will
will
billion
billion
why
why
planet
planet
organic
organic
gamma
gamma
intelligence
intelligence
the universe
the universe
may
may
reach
reach
ets
ets
lord
lord
extinction
extinction
extraterrestrial
extraterrestrial
ray
ray
seti
seti
stellar
stellar
one
one
filter
filter
the edge
the edge
radiation
radiation
rare
rare
carbon
carbon
mass
mass
who
who
universe
universe
light
light
supernova
supernova
surface
surface
edge
edge
torn
torn
galaxy
galaxy
looking
looking
creatures
creatures
civilization
civilization
got
got
Been
Been
All the Time
All the Time
All The
All The
Silence
Silence
Hope
Hope
Time
Time
Technology
Technology
Star
Star
Search
Search
Quite
Quite
Planets
Planets
Earth
Earth
Date
Date
Birds
Birds
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Radio
Martin
Martin
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Life
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Energy
Complex
Complex
anaconda
anaconda

WHY HAVEN'T WE FOUND ALIENS? An Analysis of the Problem The active Search for Extraterrestrial Intelligence SETI has been ongoing for half a century To date no ET signals from stellar systems have ever been detected Here are popular theories on why our search has come up empty THE RARE EARTH THE GAIAN BOTTLENEC Basically we're unique The Rare Earth hypothesis argues that planets with complex life like Earth are extremely rare and that intelligent extraterrestrial life is highly improbable Hence we are one of a kind They didn't survive The Gaian Bottleneck hypothesis by astrobiologist Dr Aditya Chopra suggests that alien beings are all dead-they simply didn't make it Life forms on habitable planets failed to emerge quickly enough to stabilize the planet and pave the way for more life THE GREAT FILTER THE GREAT SILENCE Earth was subjected to the Great Filter-five mass extinction events-but nevertheless evolyed complex creatures What if all habitable planets were hit with killer asteroids scorched by solar flares torn apart by geological upheavals seared by supernova blasts or gamma ray burst radiation and that of all worlds only Earth successfully hurdled the stumbling blocks? Alas we're not worth it The Great Silence hypothesis posits that advanced beings who belong to a Type III civilization on the Kardashev Scale able to harness the energy output of a whole galaxy simply do not reach out to insignificant carbon-based humans Why bother with Type O bipeds? NOT LIFE AS WE KNOW IT E RLY BIRDS Earth had a headstart In a study Dr Peter Behroozi said that compared to all the planets that will ever form in the Universe the Earth is actually quite early The last star will burn out 100 trillion years from now and 92% of planets are yet to be born We are the first-but not necessarily the last We've had it wrong all the time ETs may not be biological beings like us at all Noted astronomer Lord Martin Rees said they might be machines-not organic creatures So we should be looking for solar-harvesting non carbon-based structures instead of listening for radio signals A LONG ROAD IN A GALAXY FAR FAR AWAY Basically we've got a long way to go and a lot more searching to do SETI has barely scratched the surface of the radio universe-there are many more wavelengths to scan so we shouldn't give up hope yet 465 billion light-years is the distance to the edge of the observable universe that's really far! Weve scanned for ET signals to just around 40000 light-years from Earth we haven't even outpassed the bounds of our galaxy which is 100000 light-years wide Alien intelligences could simply be too far away for our current technology to reach Meme

found @ 8 views ON 2018-12-25 18:46:35 BY ME.ME

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