The imaginary unit, i, may seem out-of-this-world, but it really isn't; take this quiz and test your familiarity with i and the wonderful world of complex numbers. Enjoy!

A senior person in Saddam Hussain's inner circle, whose antics during the 2003 American war earned him the nickname "Baghdad Bob", and after the downfall of the Ba'ath Party, found himself a large cult following! Take this quiz and find out who, and how.

This wide, wide world contains an incredible variety of animals. Among these are the not-so-well-known coelenterates. Some of you may ask- what in the world is a 'coelenterate'? Take this quiz and learn something new!