deletions | additions       diff --git a/Now_we_have_some_important__.tex b/Now_we_have_some_important__.tex  index fb1e40d..4b84340 100644  --- a/Now_we_have_some_important__.tex  +++ b/Now_we_have_some_important__.tex 
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At this point I often hear saying: "Wait, but what about \href{http://en.wikipedia.org/wiki/Roswell_UFO_incident}{Roswell}, the \href{http://en.wikipedia.org/wiki/Wow!_signal}{WOW signal}, all those \href{http://en.wikipedia.org/wiki/List_of_reported_UFO_sightings}{UFO sightings}...?" I am not going into that. I will just state that the most economical explanations for the aforementioned stories have nothing to do with E.T. and that at this time there is no clear evidence proving we had contact with alien life. Let's use \href{http://bit.ly/KDLFp6}{Occam's Razor} and throw away the conspiracy spoon.  Back to us. The the main topic, the  Fermi Paradox suggests that the number of communicative civilizations $N$ in the Galaxy is small\footnote{Some peculiar solutions to the Fermi Paradox do not require $N$ to be small, see this \href{http://waitbutwhy.com/2014/05/fermi-paradox.html}{post} for a nice discussion}. Our revised version of the Drake Equation then implies two\footnote{Of course the third option is that both $f_i$ and $L$ are small} interesting alternatives: \begin{enumerate} \item $f_i$ is a small number. \textbf{ Life is common in the Universe, but intelligent life is not}.  \item $L$ is a small number. \textbf{Intelligent life does not spend much time in the communicative phase}.  \end{enumerate}