Only introduced 60 years ago? Huh? What about the mosaics depicting women in bikinis in the Villa del Casale in Piazza Armerina in Sicily from 300 AD. Do your research!

Actually, the first picture in the slide show is of Roman wall paintings showing women in bikini-style outfits while playing ball--they did their research.

They did mention bikini styles being worn long ago - but the bikini is a style name given 60 years ago...it didn't exist before then