October 23, 2021

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What messages have we sent to aliens?

4 min read

In the early 19th century, Austrian astronomer Joseph Johann Von Littrow earnestly proposed that humans dig trenches configured in vast geometric patterns in the Sahara desert, fill them with kerosene and light them ablaze. The idea was to send a clear message to alien civilizations living elsewhere in the solar system: We are here. 

Von Littrow never saw his idea come to fruition. Still, long after he proposed his ambitious plan, we haven’t stopped our attempts to contact extraterrestrial life.

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