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 was the exception to the rule of liberty proclaimed in the Declaration of Independence and established in the United States Constitution. 1  Since America's beginning, there has been intense debate about slavery, precisely because it raises questions about this nation's dedication to liberty and human equality.