American doctors have found that recurring nightmares in a dream may warnings of serious diseases, which would only manifest decades later. Full story

According to Finnish psychologist Atti Revonsuo, nightmares are actually positive experiences and even more – they are crucial for human race to survive. He claims all nightmares – like of falling down, being chased by monstrous animals, losing teeth or getting kicked out of school – emerge from our collective unconscious that contains experiences of human civilization repeatedly confronted with perilous challenges over the history. Full story