A cotton swab is dipped into concentrated hydrochloric acid (producing hydrogen chloride gas) while a second on is dipped into concentrated aqueous ammonia (producing ammonia gas). Both cotton swabs ...

Many people use Q-Tips brand cotton swabs as tool to remove excess ear wax from inside the ear canal, but the Q-Tips box clearly says that the swabs should not be used for this purpose.

It’s been more than a century since Max Schreck terrified audiences as Count Orlok in F.W. Murnau’s “Nosferatu: A Symphony of Horror.” Now, Robert Eggers has crafted his own vision of ...