If looked down upon from space our planet, Earth, would be seen to be a shining blue sphere teaming with possibilities and full of potential; however, you would never be able to see everything and everyone that exists on our beautiful world from orbit because you would be too removed - but if you were able to listen to what humanity broadcasts, transmits, and has shared every moment of every day, for over half a century now, then you might find it hard to understand everything that everyone is saying to one another; however, if you were to travel farther from Earth - say fifty light-years away - then you would be able to receive the transmissions of humanity that left our planet fifty years ago, and it would be like discovering a message in a bottle, or an audio signal of an era in time, that travelled at the speed of light from its source to be heard by anyone or anything that was listening in Earth’s direction.
Earth has always been a world full of stories, of civilisations, of beliefs, and our ideas about why things are the way that they are, and Earth has always been a world of invention and of dreamers who hope to be given the answer to the question of whether we are alone in the universe… for all of human existence, groups of individuals - such as scientists, artists, musicians, and believers in a particular religion - have sought to reach out their grasp and touch the face of the unknown, and reveal the truth about the meaning of life and why we are here; and since we have had the means and the resources to send living beings into space to relay back what awaits us far beyond the clouds - from dogs, to chimpanzees, to humans - as well as robotic sojourners capable of sending back images of the planets and the moons of our solar system, as well as photographs of the extraordinary phenomenon of our galaxy, humanity has been uncovering the history of the universe as well as the possibilities of reality.
In 1977, two gold disks were launched along with their respective Voyager spacecraft containing a greeting from the people of Earth, as well as images and depictions of human anatomy and the building blocks of life, the location of the sun and our solar system, and also recordings of some of the sounds that can be found and heard on our planet - such as the sound of waves crashing, birdsong, whale song, and a selection of some of the human languages that our species has evolved to use for communication between one another for centuries… even now, Voyager 1 and Voyager 2 - not to mention all the other probes we have sent out into space - continue their mission and their journey into the great unknown, hopefully to be one day found by another, similar, space-faring, intelligent, innovative, and inquisitive race of beings who might wish to see whom it was that chose to take a leap of faith and send an invitation to a fellow member of the galactic community to visit a beautiful planet that is full of people, plants, animals, and other things that need to be seen and heard to be truly believed and understood; however, it’s entirely possible that we have already been visited by an intelligent interplanetary extraterrestrial species of explorers, who were drawn to our world a long time ago and who have already bore witness to the wonders of our planet, and who have long since become obsessed with the infinite number of the sounds of Earth.