Tesla Publishes 'The Problem of Increasing Human Energy' in Century Magazine

Nikola Tesla's essay 'The Problem of Increasing Human Energy, With Special Reference to the Harnessing of the Sun's Energy' appears in Century Magazine, Volume 60, June 1900. The essay introduces a mainstream American readership to his world-wireless concept and contains the canonical passage on interplanetary communication: 'It is highly probable that if there are intelligent beings on Mars they have long ago realized this very idea, which would explain the changes on its surface noted by astronomers.' The piece is the single most-quoted source for Tesla's published speculation on signals between planets and a foundational upstream document for the postwar contactee tradition.