Who knew Alka-Seltzer could do more than just relieve pain? There are many myths about this cheap tablet, but there are also ...

An curved arrow pointing right. Astronaut Terry Virts shows what it looks like when an effervescence, such as an Alka-Seltzer tablet, dissolves in water in outer space. This demonstration was ...

Alka-Seltzer is a common antacid used to relieve an upset stomach. Alka-Seltzer and other fizzing tablets produce carbon dioxide-filled bubbles when placed in water. As the carbon dioxide is produced, ...