deletions | additions       diff --git a/Equation.tex b/Equation.tex  index c9d1871..90a31a4 100644  --- a/Equation.tex  +++ b/Equation.tex 
...
This number is extremely large, apparently larger than the\href{http://www.npr.org/blogs/krulwich/2012/09/17/161096233/which-is-greater-the-number-of-sand-grains-on-earth-or-stars-in-the-sky}{ number of grains of sand} found in every beach and every desert on Earth.  If you got this far I bet you are no wondering means now there's a very important question But how mind is racing trying to deal with the implications of this notion. And of course you are not alone. How  many of these planets host life? And in particular,\textbf{ how many planets host intelligent life we might be able to communicate with}? In order to estimate the number of technological civilizations that might exist among the stars, in 1961 Frank Drake proposed the following simple equation