Want to REALLY help out? Share this knowledge with your friends! If you share it with three friends (Pay It Forward style), and they each share it with three friends, how many iterations before we reach the entire globe (assuming no overlap)? 21.
Want to really geek out on math?The average Facebook user has 245 friends. If you share this information with only 100 of them, and each of them shares it with another 100 (and so on), it would take only 5 iterations to reach 7 billion.
Do the math yourself:
Number of iterations = log(Global Population) / log(Number of Friends to Share With)