Carl Sagan - Drake Equation Video
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carl sagan science scientist astronomy feynman neil degrasse tyson bill nye stephen hawking physics earth stars universe cosmos solar system drake equation other lifeforms technical advanced human race math problem pale blue dot education unitedcomedy elaborate in depth discussion future of the universe humanist agnostic atheist sexy games
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UnitedComedy: It's a bit outdated, Cosmos was a 70's Television show :)
robatron3: He said 400 billion stars. 2:21
magee01: Ofiicial estimates are 200-300 billion stars in our milky way. Intelligent life is rare. We can rule out millions now due to SETI being active for over 20 years, such a high a number of technologically advanced races would have given them a hit by now. There are many factors that the drake equation does not consider and I slowly came to the realization that our galaxy is not abundant with intelligent life as I once thought.
VideoNoob22: 10. And maybe even less. :<
jagai: no, only advanced civilizations within 20 lightyears around us. Remember, it takes time for rediowaves to travel in space...
BonghaarRoar: This really got me depressed, but i realized that it's actually alot, when you think of all the factors that play into the making of another "us".
BeekersSqueakers: Let us not be a victim of f sub L.
SushantaMog: magee01, yes what does the age of radio communication last long? Is there another form around the corner? Maybe it lasts 2-3 centuries after which a civilization will use a more exclusive or specific for than a broadcast of radio waves. We might have more advanced neighbors (within 20 light years) we just missed the broadcasting era. Or it hasn't arrived yet.
brtherjohn: "Cosmos" aired in 1980, though much of the science is from the 70's.
cyranothe2nd: Why would we rule them out because of SETI? It could be that they aren't as technologically advanced as we are, or that they don't use radio technology, or that they aren't carbon-based life. I'm a contact optimist. I think there must be something else out there. I just hope we can find it in my lifetime.
chrisisadouche: Oh come on magee, SETI has been active for 20 years and the vast majority of stars in our galaxy are much further away than 20 light years plus radio waves decay, are interfered with, redirected, and may not even be intelligible to us. We have no idea how prolific life is, we can't even be 100% certain what shapes and features intelligent life would have.
TheReasonWhyGuy: and yet the predictions made here, are still so close to what we now know :D
justicegrigson: What about the factor that may limit a civilisation that has learnt to live with technology without destroying itself, but simply has evolved on a planet whose resources limit it's lifespan to a few thousand years or less? Or, how about the additional factor where a planets ecology changes due to temperature changes due to the planet's proximity to it's local star such that it once again becomes uninhabitable?
Homeopathetic: 20 years, you really think that radiowaves travel far in that time? It's like an ocean and we just looked at it from a cliff. On a mountain. In the desert.
rtsjoe: Wouldn't the radiowaves be corrupted by the radiowaves emited by stars.
BaileysBeads: In this discussion it's always important to discern between (simple) life anywhere in the universe (very likely) and civilized life being close enough to communicate (VERY unlikely).
countdumas: listen to Michael Tsarion on the youtube. He is the worlds premier conspiracy researcher/lecturer/author. Dr. Bill Deagle and Alexandre are highly informative as well.
KrisdashPaul: they aren't listening for anything, they're listening for patterns. stars wail out radiation but it's constant.
keysle: i can't say i'm comfortable with those numbers...lol
NumberNile: Agreed, haha.
ivanisavich: Yea I think his estimates were way too damn high for life-producing inhabitable planets. Every solar system has 2 inhabitable planets and half of those have lifeforms? ...uhhhh...Sagan needs to brush up on his numbers!
Centari: this guy pisses me off what the fuck are u jokeing someone slap this man
ForeverZero9206: Yes, it's a shame that Carl Sagan did not live long enough to come to this video on youtube and become enlightened by the brilliance of the people who posted comments on it. Almost certainly you all have credentials that dwarf his.
22815822: Hey, hey centari, fuck you
shklm0: where do you think radiowave come from?
Author: UnitedComedy; Uploaded: Nov 9, 2009; Duration: 8:30; Views: 6568
Tags: carl sagan science scientist astronomy feynman neil degrasse tyson bill nye stephen hawking physics earth stars universe cosmos solar system drake equation other lifeforms technical advanced human race math problem pale blue dot education unitedcomedy elaborate in depth discussion future of the humanist agnostic atheist sexy games carluccio's carla bruni carlisle united carling cup highlights carling cup fixtures carl froch carlsberg carling academy carling cup carling cup draw
