Carl Sagan on Drake Equation

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Carl Sagan on Drake Equation

Uploaded by: undercoverkptic
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From Cosmos, episode 12 "The Encyclopaedia Galactica"

Tags for this video: Cosmos Drake Sagan SETI

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Or perhaps they've ... ( 2 weeks ago by clatonium)

Or perhaps they've all switched to cable t.v.

If you are actually ... ( 2 weeks ago by SpazzyMcGee1336)

If you are actually making a serious statement, I suppose there might be a way to transmit information that doesn't create any wave of photons like our radio transmissions do. However we can't assume anything beyond our knowledge of physics and so far there is no reason to believe they wouldn't be broadcasting a shit ton.

Carl Sagan has been ... ( 2 weeks ago by Hereticbooks)

Carl Sagan has been one of my heros since I was in my early 20's....R.I.P. Carl

Carl Sagan was a ... ( 2 weeks ago by Hereticbooks)

Carl Sagan was a great teacher.

Good one. They may ... ( 2 weeks ago by mindfodder)

Good one. They may not have gotten their HD converter boxes yet, either.

I've never heard ... ( 2 weeks ago by apollo33)

I've never heard ANYONE estimate the probability of spontaneous generation to be 0.5!!!

Because we exist on ... ( 2 weeks ago by Fadeux)

Because we exist on the Orion arm of the milky way galaxy. There is no reason for extra terrestrials to look for us here. Our transmissions have only been going into space for 60-70 years. That only allows systems within 60-70 light years to hear them, and it was recently discovered that they actually dissipate long before then, and turn in to noise. It's not an intergalactic super daddy, it's the simple fact that they have NO REASON to look this way.

Ah yes, that bronze ... ( 2 weeks ago by Fadeux)

Ah yes, that bronze age book of jewish fairy tales. Go sell the cow for those magic beans friend, but watch out for the gingerbread house, theres a witch in there that will eat you!

LOVE GOD !!! ( 2 weeks ago by 80s90shousemami76)

LOVE GOD !!!

Carl Sagan was a ... ( 2 weeks ago by globetrekker2)

Carl Sagan was a pompous nitwit who liked the sound of his own voice gushing "billions and billions of stars" and tried to deny god. On his deathbed his wife witnessed the awful screams of Carl " Help ome, no, stop, please, they are coming, those sharp claws, they are pulling me down, down, down,,, to Hail."

Why are there so ... ( 1 week ago by hmoob7)

Why are there so much idiots like you in this world?

There is a quote of ... ( 1 week ago by MatthiasCorvinu)

There is a quote of Sagan's that I think of anytime a biblethumper comes around spoutin' crap. It helps calm me so I don't go off on them. "It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring"

Why does every damn ... ( 1 week ago by cmarcallen)

Why does every damn astronomy video break into a religion vs. atheism battle?? Give it a rest. Neither of you is going to convince the other and astronomy can neither prove nor disprove the existence of a god. Just stop it.

Does the Drake ... ( 1 week ago by cmarcallen)

Does the Drake equation account for the habitable zone of a galaxy? Too close to the center and there's just too many gamma ray bursts flying around. It helps to be in just the right zone of the galaxy to take advantage of metal rich solar systems for terrestrial planets and be far away from all the "action" towards the galatic center.

The GHZ is being ... ( 1 week ago by mecher3k)

The GHZ is being disputed, so don't put too much weight on it.

Enrico Fermi smeeld ... ( 1 week ago by th3w4tchm3n)

Enrico Fermi smeeld a rat in all of this.
Wikipedia/google: Fermi's Paradox
Or check out Stephen Webb's book about it (I think it is even on Google Books now)

smelled not smeeld ... ( 1 week ago by th3w4tchm3n)

smelled not smeeld lol

i like thinking ... ( 1 week ago by karaokemaschine)

i like thinking about these things because it`s a mix of imagination and logicly forced facts... with the aid of logic and scientific thinking you can explore the universe in your mind which is a great thing

3:20 he says we ... ( 1 week ago by envision91)

3:20 he says we have 10 planets in our system... wasnt it only 9?

interesting idea, ... ( 1 week ago by evacuationplanb)

interesting idea, the problem with the equation is it has to make the assumption earth is a normal planet, its possible that the earth is one in a million... that would still leave millions of ET civilizations, however it would be more likely that they are extremely dispersed. It really depends on how likely you think life is. BTW i really liked Webbs book, I got it for my Bday.

They should have a ... ( 1 week ago by KhanIndustries)

They should have a guy like this on today's TV 24/7.
Instead they put on idiot preachers and televangelist.

he's referring to ... ( 1 week ago by evacuationplanb)

he's referring to one of dwarf planets that were found about that time; Sagan was a proponent of adding them as official planets, this controversy finally ended when astronomers decided to give them a distinct category, which of course Pluto was put into recently.

Clearly ... ( 1 week ago by Eric21ND)

Clearly intelligence here on Earth has a long way to go.

it saddens me that ... ( 1 day ago by gray786)

it saddens me that this man didnt live longer then he did. absolutely brilliant and one of my heros. RIP carl

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