Drake equation
Pangalactic intelligence: Here’s a guess about how many aliens in the universe
[I]n excess of four billion years ago, practically as soon as our planet had sufficiently cooled from its fiery formation, ...
Why haven’t we been contacted by alien civilizations? Maybe because most have extinguished themselves, as we likely will
For some reason, civilization is not a self-perpetuating state of affairs on this planet. And perhaps not on other planets, ...
Extraterrestrial neighbors? Our galaxy contains over 30 intelligent civilizations, new calculations suggest
In 1961 the astronomer Frank Drake proposed what became known as the Drake equation, setting out seven factors that would ...
How probable is it that we’re alone in the universe?
Earlier this year I wrote about two ways of looking at the probability of there being advanced alien civilizations – the ...
