Sometimes, less is more, and it’s even more true when you throw in some creativity. For example, the vanishing doorknob. This simple invention has a knob that retracts into the door when locked. To make it even safer, you could remove the little key / card hole at the bottom and have it have some sort of biometric scanner. Click here to view the first image in today’s viral picture. Continue reading to watch the five most popular viral videos of today, including Nissan’s glow-in-the-dark electric Leaf vehicle.
