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The Drake equation, formulated by astrophysicist Frank Drake in 1961, explores the question of why we still have yet to encounter an extraterrestrial civilization.
Elio Quiroga Rodríguez, a professor at the Universidad del Atlántico Medio in Spain, argues that Drake's equation didn't go far enough. The first would be civilizations on planets much larger than Earth would need much higher escape velocities to surmount their planet's mighty gravity. Second, the researcher considers "fishbowl worlds" where the impetus to develop long-distance communication technologies is much lower since messages already can travel over vast stretches without having to be amplified with complex tech in a fluid environment.
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