In 1927, long before the age of smartphones and smartwatches, a group of British scientists decided to test whether telepathy—the ability to transmit thoughts from one person to another—could be real.

In Mental Radio* Upton Sinclair described a great number of experiments in which Mrs. Sinclair as “percipient” seemed to have telepathic powers. He would draw six or more pictures on separate sheets ...

Mental telepathy, the process of transferring thoughts from one mind to another, has traditionally occupied the realms of either science fiction or the paranormal, both of which are outside of ...