I recorded my son, Tom, while he was laughing. I found it very funny, positive and inspiring :-))) It was in December 2018. Tom was 6 months old. My wife and I adopted Tom when he was 3 months old. He is a very joyful baby, often smiling and laughing :-) Why sending this sound to Mars: => It's positive, fun, quick and easy to understand. => Everyone made such a sound, so we can say it's universal. => In a way, I find that it's a good symbol for mankind.