In 1974, to celebrate the re-opening of the Arecibo Radio Observatory, a signal created by Carl Sagan and Frank Drake was beamed into the universe in the hopes of contacting an alien species. Here's what it said.
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From @answerswithjoe
In 1974, to celebrate the re-opening of the Arecibo Radio Observatory, a signal created by Carl Sagan and Frank Drake was beamed into the universe in the hopes of contacting an alien species. Here's what it said.