The world collagen is derived from kola, the Greek word for glue. Collagen is found throughout the body-in skin, muscles, tendons, and bones. Fibers of collagen are woven together like threads in fabric to form a framework into which new cells can grow.
UglifyJS is a JavaScript compressor/minifier written in JavaScript. It also contains tools that allow one to automate working with JavaScript code: A parser which produces an abstract syntax tree (AST) from JavaScript code.
Answer Wiki. Thanks for A2A. It means that what you see about beauty that showing by others tend to be superficial facade that others want to show you. Part of ugliness as you see in this saying is mostly to contrast with beauty in the first part of the phase. As people tend to show only their own facade of good side of themselves to others, if ugliness appears then such ugliness must be very real thing about that person.