Who doesn’t like a math pop quiz when driving down to the Mexican border? If you turn onto Interstate 19, which runs 63 miles (101 kilometers) from Tucson, Arizona, down to Mexico, the road signs ...

Have you ever noticed that systems of measurement tends to change when you leave the United States? Weight is typically measured in kilograms instead of pounds, distance is measured in kilometers over ...

1 In late 1975, President Gerald Ford had a unique vision for making America great again. He wanted to embrace a French invention – one that Thomas Jefferson himself had championed. He wanted America ...

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 ...