The human brain remains deeply mysterious. Scientists have mapped its synapses and neurons in extraordinary detail, yet ... the felt experience of being you still defies efforts at a full explanation. However, researchers do have one fascinating window into that inner world: near-death experiences, or NDEs. As the name suggests, near-death experiences are altered states of consciousness reported by upwards of one-fifth of people who experience a life-threatening medical emergency. Some common traits of NDEs have emerged over nearly 50 years of research: intense emotions of peace and joy, out-of-body experiences (OBEs), encounters with dead relatives, altered perceptions of time, and elevated lucidity, among others. These accounts from people who've nearly died appear to contradict what scientists expect to occur in the brain as its regions begin to shut down one by one. In a new qualitative study published in the journal Psychology of Consciousness: Theory, Research, and Practice, [researcher Nicole] Lindsay and her colleagues reveal details of how individuals' dreams changed drastically following an NDE. A participant named Basil said he could confidently recall one dream every week or two, but after his near-death experience, that recall became a nightly occurrence. Others reported that dreams become intensely vivid after an NDE and that the separation between dreaming and waking was much more ambiguous than it was before.