The mom of an Australian swimming star guesses her daughter Tahnee Afuhaamango has broken over three dozen world records in her career. Incredibly, Tahnee, who has Down syndrome, broke one by over six seconds without even realizing it until returning home from the competition. On Feb. 6, after completing the 200-meter freestyle event in Darwin, Tahnee, 38, headed home to Jingili to rest. That same afternoon, her mother Donna Rousham checked the times. Tahnee had clocked 3:38.72—a full 6.64 seconds faster than the world record for swimmers with Down syndrome over age 35. “I nearly died,” Donna told Australia’s ABC News. “You don’t hear of those times … this is really special.” Wanting to make the achievement official, Donna filed for paperwork with the Australian authorities who witnessed the event. The record was assessed by an international authority in England and ratified by the Oceania Athletics Association. In mid-March, the email arrived: Tahnee’s world …