In 1999, a massive radio telescope in Evpatoria, Crimea, known as the RT-70, sent out messages as part of an ambitious project called the Cosmic Call. These messages were directed at nine stars that scientists believed could potentially host life. The content of the messages was designed to be universally understandable, using concepts from mathematics and physics, such as binary code, diagrams of the solar system, and information about human biology. The signals are expected to reach their destinations between 2036 and 2070, depending on how far each star is from Earth. However, there is no certainty that any response will ever be received. The RT-70 is a massive structure, 70 meters in diameter, originally constructed for Soviet military and scientific research. After the collapse of the Soviet Union, it was at risk of being forgotten, like many Cold War-era facilities. But in 1999, it was repurposed for a unique mission: sending radio signals into space as part of the Cosmic Call project. The goal was to communicate with any advanced civilizations that might exist around those stars, using the power of the telescope to transmit messages that could be understood by beings with a scientific understanding, even if their biology or language was unknown. Creating a message for unknown recipients was a daunting task. To overcome the challenge of communicating without a shared language, the designers used mathematics and physics, which are considered universal. The message included binary code, diagrams of our solar system, and details about Earth and human biology. The aim was not just to say hello, but to provide a coherent picture of who we are and where we come from, relying on scientific principles that might be recognizable to any advanced civilization capable of receiving the signal. What makes this endeavor particularly intriguing is the timeline of the signals’ journey. The messages were sent to stars at varying distances, meaning the first signals will reach their destinations in about 35 years, while the last will arrive nearly a century after the initial transmission. This creates a kind of cosmic timeline, where the messages will be received at different points in the future. Despite the lack of guarantees—such as whether any of the stars have planets with life, or whether any potential inhabitants could detect the signal—this project holds significant symbolic value. It reflects humanity's enduring desire to reach out into the unknown, much like the Voyager spacecraft, which continue their silent journey into the depths of space.