Astronaut Terry Virts inserted an effervescent antacid tablet into a ball of water while crewmates filmed the reaction with the Red Epic Dragon camera. Disclaimer: AAAS and EurekAlert! are not ...

Alka-Seltzer is a common antacid used to relieve an upset stomach ... Alka-Seltzer reacts with an acid to make carbon dioxide gas. When you added the tablet to the vinegar or water, you heard fizzing ...