Greyhounds are defined as the fastest dog breed in the world, a tall, muscular, smooth-coated. Greyhounds are a separate breed from other related sighthounds, such as the Italian greyhound. The Greyhound is a gentle and intelligent breed whose combination of long, powerful legs, deep chest, flexible spine, and slim build allows it to reach average race speeds exceeding 64 kilometres per hour (40 mph). The Greyhound can reach a full speed of at least 21.3 m/s (77 km/h) (47 Mph) as recorded by Shall Not on the Richmond straight track on April 29, 2023 for the second sectional between 110m and 220m. #athletics #comparison #speed Usain Bolt is a Jamaican retired sprinter, widely considered to be the greatest sprinter of all time. He is the world record holder in the 100 metres, 200 metres, and 4 × 100 metres relay. An 8 time Olympic gold medallist, Bolt is the only sprinter to win Olympic 100 m and 200 m titles at three consecutive Olympics (2008, 2012, and 2016). He also won two 4 × 100 relay gold medals. He gained worldwide fame for his double sprint victory in world record times at the 2008 Beijing Olympics, which made him the first person to hold both records since fully automatic time became mandatory. An 11 time World Champion, he won consecutive World Championship 100 m, 200 m and 4 × 100 metres relay gold medals from 2009 to 2015, with the exception of a 100 m false start in 2011. He is the most successful male athlete of the World Championships. Bolt is the first athlete to win four World Championship titles in the 200 m and is one of the most successful in the 100 m with three titles, being the first person to run sub-9.7s and sub-9.6s. Bolt improved upon his second 100 m world record of 9.69 with 9.58 seconds in 2009 – the biggest improvement since the start of electronic timing. He has twice broken the 200 metres world record, setting 19.30 in 2008 and 19.19 in 2009. Speed Comparison Usain Bolt VS Fastest Man on earth Acceleration 3d comparison Usain Bolt VS Average Normal People Regular Athletics Speed Track Speed Speed 3D Fastest Woman on the planet 100m 10.54 100m 10.54s Running Fast Fast Track and Field Athlete