Video by Sarah Joseph and Jon Betz, Smithsonian Digital Studio; Text by Megan Gambino Benjamin Franklin invented swim flippers when he was 12 years old. Frank Epperson, age 11, conceived of the ...

Throughout history, Lewis Latimer’s story has largely been overlooked. But a new, permanent display in Chelsea Public Library ...

My design would be installed in line with hot and cold water supply lines during the rough-in process and would include hot and cold valve fittings that could be fitted with PEX piping that could be ...

According to researchers at Imperial College London, humans shed around 200 million skin cells each hour—and they have to go somewhere when we’re indoors. If the idea of skin dust isn’t sitting well ...

Feeling wiped out by summer heat at the start of the season—but just fine by August? That is not your imagination. Emergency physician Scott Youngquist, MD, explains how your body adapts to heat over ...

With his newly created Tesla coils, the inventor soon discovered that he could transmit and receive powerful radio signals when they were tuned to resonate at the same frequency. When a coil is tuned ...

A protractor is used to draw and measure angles. An angle is the amount of turn between two lines. Angles are measured in degrees with the symbol °. Angles can be labelled with 3 letters (eg DEF) to ...

Elysse Bell is a finance and business writer for Investopedia. She writes about small business, personal finance, technology, and more. Vikki Velasquez is a researcher and writer who has managed, ...