The mysterious world of lucid dreaming has become a little clearer after scientists achieved two-way communication between a pair of people.

For the first time, two people have successfully communicated in their dreams. The historic milestone was achieved by researchers at REMspace. The research demonstrated that lucid dreams could unlock new dimensions of communication and humanity’s potential.

REMspace, a California-based startup that designs technology to enhance sleep and lucid dreaming, exchanged a message between two participants, selected for the experiment, who were asleep on September 24.

The researchers believe that, once approved, it could represent a significant advancement in sleep research and have applications in mental health treatment, skills training, and more.