https://www.superphysics.org/tags/radio-frequency/ Recent content in Radio Frequency on Superphysics Hugo en Thu, 12 Nov 1987 00:00:00 +0000 https://www.superphysics.org/research/other/alien/essassani/transmissions/1987/1987-11-12/ Thu, 12 Nov 1987 00:00:00 +0000 https://www.superphysics.org/research/other/alien/essassani/transmissions/1987/1987-11-12/ <h3 id="foreign-relations-and-the-methodology-of-contact">Foreign Relations and the Methodology of Contact</h3> <p>We have interacted with many other civilizations going through transformations.</p> <p><strong>Biological life</strong> is the most efficient transmitter and receiver.</p> <p><strong>Light</strong> is the most efficient transmitter and receiver.</p>