🛸🔭👽 New Manchester paper urges a cosmic wink and nod. Use game theory to hunt ETs by targeting worlds that can see Earth transit the Sun. Civilisations in that sweet spot would know we exist and might beam hello. Mutual Detectability could cut through the cosmic silence. Curious, testable and deliciously odd. #MutualDetectability https://phys.org/news/2021-01-game-theory-intelligent-alien-life.html