Yes, it is possible for twins who were separated in childhood to meet each other later in life as adults without knowing they are twins until then. This scenario is often referred to as a "twins reunion" or "twin stranger" phenomenon.
There have been documented cases where twins who were separated at birth or during early childhood have unknowingly encountered each other later in life. These reunions can happen by chance, through mutual acquaintances, or even via social media platforms where people post about their lives and backgrounds. When these separated twins meet, they may notice striking similarities in appearance, behavior, or life experiences, which can lead to the discovery that they are, in fact, long-lost siblings.
In some cases, the revelation may come as a shock, especially if they were not aware of their twin status prior to meeting. The discovery can be emotionally overwhelming for some individuals, as they come to terms with the idea of having a biological sibling they never knew existed.
Several studies have been conducted on twin reunions and the psychological impact of discovering a long-lost twin. These cases provide valuable insights into the importance of genetic factors in shaping individuals' lives, even when separated at an early age.
It's worth noting that while such reunions are possible, they are relatively rare occurrences due to the myriad of factors that can influence whether separated twins ever cross paths in adulthood. However, the phenomenon has captured public interest and continues to be a subject of study for researchers in various fields, including genetics and psychology.