With a golden record on board, it left the Earth 33 years ago. NASA installed the 12-inch disk containing music and greetings in 55 languages in case intelligent extraterrestrial life ever found it.
But now the Voyager 2 spacecraft is sending back what sounds like an answer: Signals in an unknown data format!
The best scientific minds have so far not been able to decipher the strange information — is it a secret message?
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