Have you heard of The Drake Equation before?
The Drake Equation was created in the 1960s by Dr. Frank Drake to try and determine the number of possible civilizations in our galaxy with which communication may be possible. Yep…that means…
Check out the equation (and its explanation) here in Chalkdust: http://chalkdustmagazine.com/blog/the-drake-equation/
Read the article linked above. Copy out the Drake Equation and explain in your own words (not just copying the text from the article) what each variable represents. Show the values that are included in the article and how they arrive at their possible answer for N. Then give an explanation (again in your own words) why this number may not be the most accurate representation of N.