Olympic superstar Michael Phelps is unstoppable in the pool but is he as fast as a shark?
That question was answered as part of the Discovery Channel's "Shark Week" programming. The race was billed as "Phelps vs Shark: Great Gold vs Great White."
Here's how it went down:
Phelps swam 100 meters off the coast of South Africa in 38.1 seconds.
The shark recorded a time of 36.1.