What Causes Loneliness?
Certain genetic markers seem to contribute to loneliness, resulting in some people feeling lonelier than others in the same situation. Of course, loneliness is also environmental—loneliness expert Dr. John Cacioppo says that genes and environment can play a roughly equal role in determining how lonely one feels.
Key Facts In This Video
Studies have linked loneliness to certain genetic markers. (0:59)
Astronaut Al Worden was the most isolated man in history. (1:42)
Experiencing nostalgia can help with loneliness. (2:56)