This week, Jamaican Olympic sprinter Usain Bolt crushed his competitors in the 100 meter dash. But he also crushed another record after finishing the race with a time of 9.63 seconds, a record in the Olympics. Viewers are already looking forward to Bolt's next race to see if he'll put his name in the record books once again in the 200 meter dash, when he squares off against fellow Jamaican sprinter Yohan Blake.
But his 100 meter run caused many to wonder about the limits of human speed. Could there ever be a record that could not be broken? KPCC's A Martinez explains the science behind Usain Bolt.