New York magazine’s Science of Us explores latest research that helps explain what dreams are, what they might mean, and how they affect our waking lives.

In dreams, “people occur to me the way that I know them,” says Tommy Edison, who hosts a YouTube channel as the Blind Film Critic. Edison, who’s been blind since birth, interacts with others in his dreams through sound, smell, and sometimes touch: “If I were to meet you in a dream, what I would know is your voice, maybe what perfume you’re wearing.” If it’s someone who’s helped guide him in the past, he might know them in a dream by the feel of their arm.

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