By the 1960s, two major contributions were made to the field of SETI, both of which considered how more advanced civilizations could be found based on the types of structures they might build and the levels of energy they could harness.
Welcome back to our ongoing series, A Brief-ish History of SETI, where we examine the ideas and milestones that have come to define the Search for Extraterrestrial Intelligence (SETI).
In Part I, we looked at the purpose and motivations for this field of study, some of the earliest experiments, and how they reflected a growing sense of curiosity about the cosmos and our place in it.
