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.
... \sqrt {b^2-4ac}</math>
in the formula should be understood as "either of those element(s) of the field whose square equals b2 - 4ac". In some fields, som ...