1993 - CanadiansprinterBen Johnson[?] is banned from international competition for life after testing positive for banned substances for the second time.
1998 - NASA announced that that the Clementine spaceprobe orbiting the moon had found enough water in polar craters to support a human colony and rocket fueling station.
... whose characteristic is not 2. (In a field of characteristic 2, the element 2a is zero and it is impossible to divide by it.)
The symbol
<math>\pm \sqrt ...