skepticism consciousness science parapsychology spirituality science near-death experience skeptics consciousness Christianity psi psychics & mediums conspiracy theories atheism UFO science and religion neuroscience philosophy contactee experience alien consciousness others OBE psychic detectives remote viewing religion psychology mediumship Rupert Sheldrake paranormal ET telepathy past lives after death communication gnosticism NDE buddhism occult materialism quantum physics yoga psychedelics psychics/mediums Global Consciousness Project shamanism climate change evil