Clocks are one of the very first complex machines created by humans. Initially they all had pendulums and gears, but now they come in many different forms, from quartz watches to atomic clocks! Here are the HowStuffWorks articles that explain how they all work:
You Might Also Like
Your wrist device links to a net of synchronized computers orbiting Earth to provide you with highly accurate data: It's not sci-fi; it's a GPS watch.
So, you're a new parent and you want some high-tech baby gadgetry that'll make you standout at playgroup? This state-of-the-art stroller should do the trick.