Signals to the Cosmos: A History of Humanity's Attempts to Contact Extraterrestrial Life

To the point

People have long tried to contact alien life by sending messages and keepsakes into space, from the 1974 Arecibo Message by Frank Drake and Carl Sagan to Evpatoria, Pioneer plaques, Voyager records, and the Beacon in the Galaxy idea led by Jonathan H. Jiang, plus Celestis memorial messages, all using math, primes, physics, DNA, and Earth maps so others might understand, but there is no confirmed contact and the signals may still be traveling with no guaranteed reply.

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Signals to the Cosmos: A History of Humanity's Attempts to Contact Extraterrestrial Life

Humankind has long sought contact with extraterrestrial life by encoding mathematics, biology, and humanity into signals and artifacts—from the 1974 Arecibo broadcast by Frank Drake and Carl Sagan to the Evpatoria Morse transmissions, Pioneer plaques, and Voyager Golden Records—featuring the Arecibo Message’s prime-based decoding and a human figure, a Beacon in the Galaxy proposed by Jonathan H. Jiang organized into 13 sections of about 204,000 bits inviting a reply, and Celestis Memorial Spaceflights enabling people to add names or messages for a three million kilometer Enterprise Flight, all under the premise that universal elements may bridge language gaps even as no contact has been confirmed and signals may still be traveling with no guaranteed response.