ZIP Codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, was chosen to suggest that the mail travels more efficiently, and therefore more quickly (zipping along), when senders use the code in the postal address. The basic format consists of five numerical digits. An extended ZIP+4 code, introduced in 1983, includes the five digits of the ZIP Code, a hyphen, and four additional digits that determine a more specific location within a given ZIP Code.
The Pink River Dolphins of the Amazon River in South America are  pink-colored because they have a lot of blood vessels near the  surface of their skin, so that they can betâ¦ter control their body  temperature.    The pink river dolphin of the Amazon River is rare.
Portrait of a Bottlenose Dolphin. As members of the whale family, dolphins are fully aquatic mammals that spend their entire lives underwater. They only need to breath air from the surface once every 5 to 10 minutes using the blow hole at the top of their heads which is like a large nostril. There are almost forty different species of dolphins with the killer whale being the largest. The bottlenose dolphin is the species of Flipper fame that we are most familiar with, and the species that is regularly referred to as simply dolphin. The term dolphin is not synonymous with porpoise. Porpoises are six species within the dolphin family differentiated by their flat teeth.