https://www.vice.com/en_us/article/4admym/scientists-achieve-real-time-communication-with-lucid-dreamers-in-breakthrough

Humanity has been able reach distant vistas, such as the Moon, the deep oceans, and the wild expanses at Earth’s poles. Now, scientists have made a new breakthrough in the exploration of a very different type of frontier—the hallucinatory world inside dreams.

An international team of researchers was able to achieve real-time dialogues with people in the midst of lucid dreams, a phenomenon that is called “interactive dreaming,” according to a study published on Thursday in Current Biology.