The Drake Equation examined (science video).

The Drake equation provides a rough estimate of the number of civilisations in our galaxy … so where is ET and why have we yet to come across them?

In this 35 minute science video, Ian Crawford, professor of planetary science and astrobiology at Birkbeck, University of London, examines what known variables we can now throw into the Drake equation, and comes up with the depressing conclusion that advanced tool-using life in the universe – as opposed to just bugs, which might be very common – could be a heck of a lot rarer than we first thought.

Down to just one race at the moment – humanity

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