The fastest 100-meter sprint at the World Athletics Championships was 13 years ago.
In Berlin, the eight men in the World Cup finals averaged 9.92 seconds.
Since then, times have remained largely constant.
Meanwhile, the women's races are getting faster and faster.
In Eugene, Oregon, the sprinters set a new world championship record.
The fastest sprint by a woman is still unmatched: American Florence Griffith-Joyner ran the 100 meters in 10.49 seconds 34 years ago.
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