deletions | additions       diff --git a/Updating Drake Eq.tex b/Updating Drake Eq.tex  index ed8c27d..86d4670 100644  --- a/Updating Drake Eq.tex  +++ b/Updating Drake Eq.tex 
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$n_e$ Is the \textbf{fraction of Earth-like planets}.   As from last year we also know this factor! Earth-like planets are very common. Statistically speaking at least 1 in 5 planets around Sun-like stars could potentially support life \cite{Petigura_Howard_Marcy_2013}. $n_e \approx$ 0.2  So the product of the first 3 terms is now well established and is, using a conservative approximation, is  of order 1. 5.  $N =\underbrace{\overbrace{R}^{\approx10} \times \overbrace{f_p}^{\approx 1} \times \overbrace{n_e}^{\approx 0.2}}_{\sim 1} 5}  \times \underbrace{f_l \times f_i \times f_c \times L}_{?}$ We can then simplify the Drake equation and re-write it in its "2014 form" as:  $N \approx 5\times  f_l \times f_i \times f_c \times L$