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 final reason for the abolition of slavery were the actions of white middle class people in Britain. Some middle class campaigners were Granville Sharp and William Wilberforce. Granville Sharp helped black slaves get freedom. In 1765 Granville Sharp saw a black man with his head swollen and he could hardly walk.