On the upcoming episode of SBS's "Star King", the members of KARA took part in an experiment to find out their 'brain age'. The girls had to wear a special headpiece that measured their level of focus. While wearing it, they should be able to make a fan spin with the power of concentration alone. The fan was said to be solely operated by the brain, and not electricity; the higher the concentration, the more the fan will spin in one minute. Kang Sul Chul Ph.D invented this machine for his son, who cannot focus very well. He says he made it spin nine times. The members of KARA sought to do the same. Han Seungyeon made it spin 10 times, which means that her brain age is in its 10's (meaning that its healthy and full of energy). However, leader Park Gyuri could only make it spin four times, proving that her brain age is in its 40's. The most shocking result of all was Goo Hara's, who could only make one rotation. More details will be revealed when the show airs on September 24th! Source: Financial News via Naver