Shadow beings are often described as dark, humanoid figures that appear in peripheral vision or during moments of sleep paralysis. They are typically associated with feelings of fear or unease and are reported by individuals across various cultures. Some people believe these entities are manifestations of negative energy or spirits, while others consider them to be hallucinations or psychological phenomena. The concept of shadow beings has gained popularity in paranormal discussions and is sometimes linked to UFO sightings or ghost encounters. Despite numerous anecdotal accounts, there is no scientific evidence to support their existence, leaving their true nature a topic of speculation and debate.