History of Drake equation

	Revision 31 . . December 4, 2001 7:04 am by (logged).128.164.xxx ["without blowing themselves up" -> "become willing and able to communicate"]
	Revision 30 . . (edit) December 4, 2001 6:56 am by The Anome [added another external reference]
	Revision 29 . . December 4, 2001 6:53 am by The Anome [added long civilisation lifetime data point]
	Revision 28 . . December 4, 2001 6:27 am by The Anome [added two sample Drake computations]
	Revision 27 . . (edit) December 4, 2001 6:14 am by The Anome [fixed sentence up]
	Revision 26 . . December 4, 2001 6:13 am by The Anome [not everyone believes in the anthropic principle]
	Revision 25 . . December 4, 2001 4:58 am by The Epopt [reason for now increasing the value of L]
	Revision 24 . . (edit) December 4, 2001 4:41 am by (logged).128.164.xxx [silly me, didn't see the link already there]
	Revision 23 . . (edit) December 4, 2001 4:40 am by (logged).128.164.xxx [quick clarification of anthropic principle]
	Revision 22 . . December 4, 2001 4:38 am by (logged).128.164.xxx [N << 1 is compatable with observations due to the anthropic principle]
	Revision 21 . . December 4, 2001 4:26 am by (logged).128.164.xxx [more discussion of the terms]
	Revision 20 . . December 4, 2001 3:47 am by The Anome [Added in-article textual pointer to Fermi paradox.]
	Revision 19 . . December 4, 2001 3:24 am by The Anome [added external link, mentioned alternative N << 1]
	Revision 18 . . December 4, 2001 3:15 am by Taw [n_e is not a fraction]
	Revision 17 . . (edit) December 4, 2001 2:55 am by The Anome [linkified Frank Drake]
	Revision 16 . . December 4, 2001 2:55 am by The Anome [-> Anthropic Principle]
	Revision 15 . . (edit) December 4, 2001 2:52 am by The Anome ['Green bank eqn' in bold]
	Revision 14 . . December 4, 2001 2:49 am by The Epopt [added Drake's values for the parameters]
	Revision 13 . . (edit) December 4, 2001 2:48 am by The Anome [spelling: 'publicised']
	Revision 12 . . December 4, 2001 2:47 am by The Anome [Set N to 1.]
	Revision 11 . . December 4, 2001 2:45 am by The Anome [mentioned alternative name]
	Revision 10 . . December 4, 2001 2:41 am by The Anome [fermi paradox in bold]
	Revision 9 . . (edit) December 4, 2001 2:27 am by The Epopt
	Revision 8 . . (edit) December 4, 2001 2:27 am by The Epopt
	Revision 7 . . (edit) December 4, 2001 2:23 am by The Anome [para break]
	Revision 6 . . December 4, 2001 2:22 am by Bryan Derksen [Fermi paradox]
	Revision 5 . . (edit) December 4, 2001 2:20 am by The Anome [added entities for >]
	Revision 4 . . (edit) December 4, 2001 2:19 am by The Anome
	Revision 3 . . December 4, 2001 2:15 am by The Anome [correction... added remark about N >> 1 given conservative parms]
	Revision 2 . . December 4, 2001 2:11 am by The Anome [entered explanation of equation]
	Revision 1 . . December 4, 2001 2:05 am by The Anome [added form of Drake equation]

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Difference (from prior major revision) (no other diffs)

Changed: 36c36

alternatively, making some more optimistic assumptions, and assuming that 10% of civilisations avoid blowing themselves up, and then spread through their local star systems for 100,000 years (a very short period in geologic time):

alternatively, making some more optimistic assumptions, and assuming that 10% of civilisations become willing and able to communicate, and then spread through their local star systems for 100,000 years (a very short period in geologic time):