Artwork: How radio waves travel from a transmitter to a receiver. 1) Electrons rush up and down the transmitter, shooting out radio waves. 2) The radio waves travel through the air at the speed of light. 3) When the radio waves hit a receiver, they make electrons vibrate inside it, recreating the original signal.
A glass of port, a fortified wine. Fortified wine is a wine to which a distilled spirit, usually brandy, is added. Many different styles of fortified wine have been developed, including Port, Sherry, Madeira, Marsala, Commandaria wine, and the aromatized wine Vermouth.
Sherry is a type of fortified wine, meaning that a stronger liquor such as brandy is added to the wine. The elevated alcohol content of sherry makes it more shelf-stable, which was useful in sherry's early days since it meant that the wine could be shipped.