Arabic word so it's romanised in more than one way - Koran, Quran, Qur'an, due to their having a different alphabet / their letters not always having direct equivalents to ours. Both spellings are correct / accepted.
In the past the world record had been broken by bigger margins. Also, because each course can be so different and the conditions play such a large role you can't easily compare performances like you can for track events.
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