Pulmonary embolism is the sudden blockage of a major blood vessel (artery) in the lung, usually by a blood clot . In most cases, the clots are small and are not deadly, but they can damage the lung. But if the clot is large and stops blood flow to the lung, it can be deadly.
The term chiaroscuro (from the Italian words chiaro, meaning light, and scuro, meaning dark) refers to the use of light and shade in a work of art to define three-dimensional objects. Masters of this technique were the Italians Leonardo da Vinci and Caravaggio and the Dutch painter Rembrandt.
Chiaroscuro is an artistic technique, developed during the Renaissance, that uses strong tonal contrasts between light and dark to model three-dimensional forms, often to dramatic effect. It is one of the four canonical painting modes of Renaissance art. The underlying principle is that solidity of form is best achieved by the light falling against it. Artists known for developing the technique include Leonardo da Vinci, Caravaggio, and Rembrandt. It is a mainstay of black and white and low-key