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A wristwatch is an essential part of your wardrobe, but have you ever stopped to wonder why? Learn more about why we wear wristwatches.

These gadgets are great for Father's Day or for other birthdays and celebrations. See 10 gadgets at HowStuffWorks that will make dad's day.

Astrolabes are exquisitely crafted instruments that have hundreds of uses. Isn't it time you learned how to use this handy decoder of the sky?

Thermochromatic ink is temperature-sensitive and once rocked the '70s. Find out how thermochromatic ink works.

Dive watches don't just tell time; they can save your life. Find out how dive watches work and the benefits to divers.

The FitBit tracker helps you stay healthy by nudging you to eat well, get exercise and get enough sleep. See how FitBit works.

Using bone-conducting headphones instead of ear buds may be a lot better for your ears. How do these bone-conducting headphones do their job?

E-writers are simple electronic devices that let you write down your thoughts. Learn all about the features and pros/cons of e-writers.

Jukeboxes are a colorful slice of Americana that brought on-demand music to the masses. Take a look inside a jukebox and find out how jukeboxes work.

Vibration speakers work with other surfaces to enhance sounds. Learn all about how vibration speakers work.