Biohacker Amal Graafstra has created a prototype for the world’s first implant-activated “smart gun,” which requires an embedded chip be implanted under the skin between the thumb and forefinger. When a user picks up their weapon, the gun would unlock only for the person with the implant. “I think the smart gun concept is important, because eventually we’d be able to control who’s able to operate the weapon once it leaves the store,” said Graafstra. 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 Prince Rupert’s Drop shattering bullets at 150,000 frames per second.