4 ms·

Drake equation: How many alien civilizations exist? (interactive chart)

• Juha 14y ago
  In my these are the only numbers that matter: "% change a habitable planet develops life" and "% chance change that life develops intelligence". Those are the most uncertain, and cause most difference in the result. Also, it's a bit unrealistic that smallest number you can choose is 1%, I doubt 1 in 100 earth-like planets will develop life.
• shanelja 14y ago
  "We're sorry but this site is not accessible from the UK as it is part of our international service and is not funded by the licence fee. It is run commercially by BBC Worldwide, a wholly-owned subsidiary of the BBC, the profits made from it go back to BBC programme-makers to help fund great new BBC programmes." So let me get this right, I pay £170 per year in license fees for you to refuse me access so people in other countries who haven't paid the license should be allowed to access this for free? ^.-