Arecibo

0.00 : preparing to send the message 0.11 : the radio telescope is being pointed towards Hercules Globular Cluster. 0:22 : the telescope sends the message. 0.33 : the message is travelling the universe... 1.07 : somewhere, in the space, an antenna intercepted a strange signal, "they" are trying to understand it... 1.22 : "they" finally found how to read this ! "They" are writing their reply. "They" have so much things to say. 1.58 : "Their" message is being sent. 2.20 : The message is travelling the universe, again. 2.54 : 25 000 years later, 50000 after the first emission, somewhere on Earth, an antenna captures a strange signal... http://en.wikipedia.org/wiki/Arecibo_message http://de.wikipedia.org/wiki/Arecibo-Botschaft http://fr.wikipedia.org/wiki/Message_d%27Arecibo