People online claimed the video showed the result of "grooming" and called for parents and educators to be arrested.

Ultrasonic levitation is by now a familiar trick: one or more ultrasonic transducers create a standing wave, and small ...

The World Health Organization (WHO) International Classification of Impairment, Disabilities, and Handicaps (ICIDH) system is used to classify the types of visual impairment. This system, as the name ...