Waltz

The waltz (from German: "Walzer") is a smooth, progressive ballroom and folk dance, normally in  triple  time, performed primarily in closed position.

Introduction and acceptance

There are several references to a sliding or gliding dance—a waltz—from the 16th century, including the representations of the printer H.S. Beheim. The French philosopher Montaigne wrote of a dance he saw in 1580 in Augsburg, where the dancers held each other so closely that their faces touched. Kunz Haas (of approximately the same period) wrote, "Now they are dancing the godless Weller or Spinner." "The vigorous peasant dancer, following an instinctive knowledge of the weight of fall, utilizes his surplus energy to press all his strength into the proper beat of the measure, thus intensifying his personal enjoyment in dancing".

The peasants of Bavaria, Tyrol, and Styria began dancing a dance called Walzer, a dance for couples, around 1750. The Ländler, also known as the Schleifer, a country dance in 3
4 time, was popular in Bohemia, Austria, and Bavaria, and spread from the countryside to the suburbs of the city. While the eighteenth century upper classes continued to dance the minuet, bored noblemen slipped away to the balls of their servants.

Dream

Dreams are successions of images, ideas, emotions, and sensations that occur usually involuntarily in the mind during certain stages of sleep. The content and purpose of dreams are not definitively understood, though they have been a topic of scientific speculation, as well as a subject of philosophical and religious interest, throughout recorded history. The scientific study of dreams is called oneirology.

Dreams mainly occur in the rapid-eye movement (REM) stage of sleep—when brain activity is high and resembles that of being awake. REM sleep is revealed by continuous movements of the eyes during sleep. At times, dreams may occur during other stages of sleep. However, these dreams tend to be much less vivid or memorable.

The length of a dream can vary; they may last for a few seconds, or approximately 20–30 minutes. People are more likely to remember the dream if they are awakened during the REM phase. The average person has three to five dreams per night, and some may have up to seven; however, most dreams are immediately or quickly forgotten. Dreams tend to last longer as the night progresses. During a full eight-hour night sleep, most dreams occur in the typical two hours of REM.