Ultrasound researcher Asier Marzo has managed to 3D-print a levitator capable of levitating liquids and solids in mid-air using acoustic waves. He lined both ends with 72 transducers, connected them to an Arduino board, and then when 6-10 volts are run through them, it generates sound waves at a frequency of 40 kHz. Those sound waves can support objects in mid-air, while levitating the liquids require lower voltage. Click here to view the first image in today’s viral picture gallery. Continue reading for the five most popular viral videos today, including one of the nine weirdest things on Amazon.