Red is any of a number of similar colors evoked by light consisting predominantly of the longest wavelengths discernible by the human eye, in the wavelength range of roughly 630–740 nm. Longer wavelengths just past this range are called infrared (below red) and cannot be seen by the naked eye although they can be sensed as heat. In some cultures, certain shades of red are used to symbolize anger or aggression.

It is the color of blood when it is exposed to sunlight. In western countries, it is most commonly referred to as a color of evil, love, and sometimes, though rarely, happiness.

The word red comes from the Old English rēad. The word can be further traced to the Proto-Germanic rauthaz and the Proto-Indo European root reudh-. In Sanskrit, the word rudhira means red or blood. In the English language, the word red is associated with the color of blood, certain flowers (e.g., roses), and ripe fruits (e.g., apples, cherries). Fire is also strongly connected, as is the sun and the sky at sunset. Healthy, light-skinned people are sometimes said to have a "ruddy" complexion (as opposed to appearing pale). After the rise of socialism in the mid-19th century, red was used to symbolize and describe revolutionary movements.

In Christianity, the second coming of Christ, the second advent, sometimes called the parousia, is the anticipated return of Jesus Christ from Heaven, where he sits at the right hand of God, to earth. This belief is based on prophecies found in the canonical gospels and in most Christian and Islamic eschatologies. Christians generally believe the anticipated event is predicted in biblical messianic prophecies. Views about the nature of Jesus' Second Coming vary among Christian denominations and sometimes among individual Christians within these denominations.

Most English versions of the Nicene Creed in current use include the phrase: "He [Jesus] will come again in glory to judge the living and the dead, and his kingdom will have no end. ... We look for the resurrection of the dead, and the life of the world to come. Amen."

Several different terms are used to refer to the second coming of Christ.

In the New Testament the Greek word ἐπιφάνεια (epiphaneia, appearing) is used five times to refer to the return of Christ.^{[original research?]}

The human back is the large posterior area of the human body, rising from the top of the buttocks to the back of the neck and the shoulders. It is the surface opposite to the chest, its height being defined by the vertebral column (commonly referred to as the spine or backbone) and its breadth being supported by the ribcage and shoulders. The spinal canal runs through the spine and provides nerves to the rest of the body.

The central feature of the human back is the vertebral column, specifically the length from the top of the thoracic vertebrae to the bottom of the lumbar vertebrae, which houses the spinal cord in its spinal canal, and which generally has some curvature that gives shape to the back. The ribcage extends from the spine at the top of the back (with the top of the ribcage corresponding to the T1 vertebra), more than halfway down the length of the back, leaving an area with less protection between the bottom of the ribcage and the hips. The width of the back at the top is defined by the scapula, the broad, flat bones of the shoulders.