When you unlock a phone, it means that you alone own the device and can use it with any cell phone carrier.

The Apple Watch comes with several different ways to lock and unlock the device. Here's a guide on how to use all of them.

Ever been locked out without a key? In this captivating video, uncover 3 ingenious methods to unlock a door using Coca Cola.

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A study suggests that the first of seven key pyramids in Egypt, the Step Pyramid of Djoser, was built using a hydraulic lift. Dated to about 4,500 years ago, this would move up the introduction of ...