Portable Network Graphics. Portable Network Graphics (PNG /ËpÉªÅ/) is a raster graphics file format that supports lossless data compression. PNG was created as an improved, non-patented replacement for Graphics Interchange Format (GIF), and is the most widely used lossless image compression format on the Internet.
The slavery in the United States was a paradox because it contradicted the American ideal of freedom C. Slavery is one the black chapters in mankind history. It shows barbarian, immorality and misunderstanding.
The transatlantic slave trade is unique within the universal history of slavery for three main reasons: 1  its duration - approximately four centuries. 2  those vicitimized: black African men, women. 3  the intellectual legitimization attempted on its behalf - the development of an anti-black ideology and its legal organization, the notorious Code noir.