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.
New research examines 10 different types of global technological civilizations, how they govern themselves, how they use resources, and other factors, to determine which types may endure and which may be doomed to collapse.…
