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.
Slavery in the United States was the legal institution of human chattel slavery that existed in the United States of America in the 18th and 19th centuries after it gained independence and before the end of the American Civil War.oth in Brazil and in the United Statesâthe countries with the two largest slave populations in the Western Hemisphereâthe end of slavery found the regions in which slaves had been concentrated poorer than other regions of these same countries.