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.
Why Did Slavery Last So Long? There is something wrong with this question, namely: slavery still exists. For example, in recent years slave raiders from northern Sudan have captured young people, and these youths have worked against their will for individuals in the north. Some of those enslaved are now returning to their hometowns. On the BBC website do a search for slavery.