  Suppose that you're going to school and arrive at a bus stop. How long do you
have to wait before the next bus arrives? Surprisingly, it is longer - possibly
much longer - than what the bus schedule suggests intuitively. This phenomenon,
which is called the waiting-time paradox, has a purely mathematical origin.
Different buses arrive with different intervals, leading to this paradox. In
this article, we explore the waiting-time paradox, explain why it happens, and
discuss some of its implications (beyond the possibility of being late for
school).
