31. Extraterrestrial Intelligence: Are We Alone? We’ll have to make many (educated) guesses to evaluate odds of ETs in our huge Galaxy But for many guesses we have only a SINGLE data point: our Earth This makes it almost impossible to be “scientific”
32. A Fearless Estimate Drake “Equation” for the number of “technical civilizations” currently in Milky Way: N = (SFR) x n habit planets x f life x f intel x f tech x L Simple accounting of our ignorance, which increases from left term to right
53. Pessimists say we have to search almost our entire galaxy to find intelligent company: 200 billion stars offer a lot of possibilities, but typical distances are now tens of thousands of light years!
54. In that case, why stop with our own Galaxy, since we could reach thousands more, going another factor of 100 further in distance…
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56. Arecibo 1000 foot dish in Puerto Rico, with very powerful radio transmitter
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58. Even George Lucas can’t imagine how strange ETs will really be, and that is mathematical certainty These are all just humans, dressed up in fancy costumes!
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62. (Personal) Overview of some of Homo Sapiens’ Highs and Lows What snaps would You send to the Galactic Club? Whatever you say about all these spectacular Highs and Lows, We HUMANS did them 100% on our own No matter how many times we mess up, WE HUMANS will never stop trying I PREFER this to the prospect of some superior aliens doing it all for us
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