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Making a microphone using two cups Working Principle: The vibrations created by the Kid's voice (differences in air pressure) are captured by the paper cup and transferred to a needle that “scars” the plastic cup as it spins, creating tiny grooves/channels. Then, to play the sound back, the process is reversed: the needle is placed at the start of the groove and the plastic cup (the medium onto which the groove was created) is spun in the opposite direction. By running along the groove, the needle follows the pattern it had cut previously and creates vibrations. These vibrations are then amplified by the paper cup and voila!

Footage from the Parker Solar Probe as it passes within 5 million miles of the Sun's surface

Have you ever seen an ant pulling the live mosquito

Aerojet Rocketdyne performed the first hot fire test of its ESR-73 solid rocket motor, at the company’s Engineering, Manufacturing and Development (EMD) facility in Camden, Arkansas. According to Aerojet Rocketdyne, eSR-73 is ~132 cm (52 inches) in diameter and weighs roughly 3538 kg (7,800 pounds), being designed as “an upper stage that can function as a second or third stage for a variety of large solid rocket motor applications”. Credit: Aerojet Rocketdyne