The logo for the United States Postal Service is a mean-looking eagle. But a true fluid dynamics geek might look at it and realize that eagle is moving so fast it’s causing a shock wave.

A new logo, dubbed Eagle in Flight ... perched atop the phrase "USPS 250" in the traditional USPS colors of red, white and blue. Other planned celebrations include releasing commemorative stamps ...

A new corporate logo, featuring an eagle’s head, will represent the U.S. Postal Service. Postmaster General Marvin Runyon announced the new corporate logo Tuesday in letters sent to more than ...