Millions of people tuned in to watch an epic race on Sunday night. America’s top Olympic athlete Michael Phelps versus a great white shark, one of the most predatory animals in the ocean. The race aimed to see which creature could swim 100 meters faster. The race was broadcast on a U.S. television series called Shark Week, which is shown on the Discovery Channel. The channel had been promoting the race for weeks. It acknowledged that the shark would probably win. Great white sharks can swim about 40 kilometers per hour. Phelps’ best times are closer to 9.5 kilometers per hour. But the program promised to help Phelps. SharkWeek said: “In order for Michael Phelps to beat a shark, he must become a shark.” The Discovery Channel called the race “the battle for ocean supremacy.”