Tower of Babel
And now, a long overdue nerd moment.
Here, on Space.com, scientists debate whether mathematics could possibly be a universal language that we could use to communicate with extraterrestrial beings.

I tend to agree with Sundar Sarukkai - statistically speaking, it seems highly unlikely. Our system of mathematics is an extremely complex universe based on thousands of postulates and assumptions that we cannot guarantee others with different biological, environmental, and sociological backgrounds will share. I'm much more intrigued by the idea of what an alternate, yet equally viable math system would look like.