Labels:book | bulletin board | hakham OCR: The Drake Equation fI: The fraction of those planets where life develops. Although planet orbits in the habitable zone ofa suitable star, other factors are necessary for life to arise Thus only fraction of suitable planets will actually develop life The fraction life sites where intelligence develops. Life on Earth began over 3.5 billion years ago Intelligence took a long time to develop on other life-bearing planets it may happen faster it may take longer, orit may not develop at all. FC The fraction of planets where technology develops The fraction of planets with intelligent life that devel lop technological civilizations, i.e. technology that releases detectable signs of their existence into space The "Lifetime" 01 communicating civilizations The length of time such civilizations relea ...
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