👽Contact between culturally different civilizations historically leads to the destruction of one civilization.
🌟Observing stars with highly variable light levels can help us find alien civilizations collecting energy.
🗣️Deciphering an alien language is difficult, as language structures and concepts may vary.
🧮Mathematics, such as the pythagorean theorem, may serve as a universal communication tool.
📡Radio signals can be a potential means of communication with extraterrestrial civilizations.