Scientists have been investigating nightmares for over a century. Their work has resulted in some seriously bizarre findings, but nothing is more strange than the discovery of what people's most common nightmares are.
A Strange Fact About Nightmares
Before we begin, it's important to be clear about what we mean when we talk about "nightmares." A true nightmare, as defined by sleep researchers and standard diagnostic texts, is a disturbing, emotionally intense dream that ends with the dreamer waking from sleep. It doesn't matter if your psyche just cooked up the most metaphysically sublime dreamscape this side of a bad acid trip – if you don't wake up, the experience is technically classified not as a nightmare, but as a "bad dream." (Also not to be confused with nightmares: night terrors.)