This year's Olympic Games means another dose of track superstar, Usain Bolt.Bolt, an Olympic multi-medalist, is the fastest man ever recorded. The Jamaican sprinter was best known for his performance in the 2008 Summer Olympics in Beijing, where he sprinted 100 meters in a 9.58 seconds. That's about 23 miles per hour.Some scientists are not just impressed, they're baffled by his speed given his physiology. The 6-feet-5 inch sprinter towers over his competitors, and his long legs give him a longer stride. While other professional runners average 44 steps per 100 meters, Bolt averages 41.
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