As a sleep research expert, I have a profound understanding of the human sleep cycle and its importance to our health and well-being. Sleep is a vital biological function that plays a crucial role in memory consolidation, learning, and overall cognitive performance. It is also essential for physical health, as it allows the body to repair tissues, synthesize hormones, and build immune function.

The question of who has slept the longest is intriguing and has been a topic of scientific interest. The record for the longest period a human has gone without sleep, according to scientifically documented evidence, is held by Randy Gardner. Born on August 7, 1949, Gardner is notable for his remarkable feat in 1964. As a high school student in San Diego, California, he managed to stay awake for an astounding 264.4 hours, which equates to 11 days and 25 minutes. This record was achieved without the use of any stimulants, making it an extraordinary testament to human endurance.

It is important to note that such an endeavor is not without its risks. Prolonged sleep deprivation can lead to a myriad of health issues, including impaired cognitive function, mood swings, hallucinations, and even more severe psychological and physiological consequences. The human body is not designed to function optimally without sleep, and the effects of sleep deprivation can be detrimental to one's health over time.

The study of sleep and its effects on the human body is a complex and ongoing field of research. Scientists continue to explore the intricacies of the sleep-wake cycle, the functions of sleep, and the consequences of its deprivation. Understanding the limits of human endurance, as demonstrated by individuals like Randy Gardner, provides valuable insights into the resilience of the human body and the necessity of sleep for maintaining health and cognitive function.

Now, as requested, I will proceed with the next steps of the task.

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Randy Gardner (born August 7, 1949) is the holder of the scientifically documented record for the longest a human has intentionally gone without sleep not using stimulants of any kind. In 1964, Gardner, a high school student in San Diego, California, stayed awake for 264.4 hours (11 days 25 minutes).read more >>