The most famous packing problem concerns spheres. In 1611, the astronomer Johannes Kepler proposed that the densest way to ...

Bringing detergent or soap with you is key to staying clean when traveling. But how can you bring liquid soap through TSA?

Acid reflux and gastroesophageal reflux disease (GERD) can cause stomach acid to travel into the esophagus. This may result in uncomfortable symptoms like heartburn and acid regurgitation.