Michael Phelps to race a great white shark as part of Discovery Channel's 'Shark Week'
Michael Phelps, the most successful Olympian of all time, will race against a great white shark as part of a television show due to air in July.
A press release from the Discovery Channel promises that "the world's most decorated athlete takes on the ocean's most efficient predator".
Phelps, 31, has 23 Olympic swimming gold medals and retired after Rio 2016.
The American has a top speed of six miles per hour in the water, whereas a great white can reach 25mph.