(THE CONVERSATION) To a nonmathematician, having the letter “i” represent a number that does not quite exist and is “imaginary” can be hard to wrap your head around. If you open your mind to this way ...

Bernhard Freddy Roduner, 44, allegedly boarded a Brisbane-bound flight at Sydney Airport on January 14 and was overheard referring to a bomb during a phone conversation before takeoff. He was ...