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.
Teach US History. Slavery was the most important and divisive issue in 19th-century American politics and society. At the end of the Revolution, the new American nation was divided between the southern states whose economies were heavily dependent on slavery and northern states where slavery was legal but not economically important.