The one term of the Drake equation whose value remains completely unknown is the average lifetime of a technological civilization.

Question

Quizplus · Accepted Answer

The Drake equation estimates the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy. While we have made estimates or have some understanding of the other terms in the equation, the average lifetime of a technological civilization is highly speculative and remains completely unknown, as it involves predicting the future of not only our civilization but any other potential civilizations as well.

The One Term of the Drake Equation Whose Value Remains