Add Yahoo as a preferred source to see more of our stories on Google. The inch, based on the length of a thumb, and the foot based on, well, the length of a foot, are inherently associated with human ...

Blame it on timing. When James Watt gave the term horsepower an exact-ish definition in the 1780s, he actually borrowed the math behind it from one of Isaac Newton's assistants. It was John ...

The United States is one of just three countries that "prefers" imperial measurements over the international metric standard. The motivation why has less to do with official policy than you might ...