"I suppose they can detect sound vibrations - most marine creatures can - though this atmosphere may be too thin to carry my voice very far... Hello, can you hear me? My name is Frank Pool... ahem... I come in peace for all mankind. Makes me feel rather stupid, but can you suggest anything better? And it will be good for the record... Nobody's taking the slightest notice. Big ones and little ones, they're all creeping towards their igloos. Wonder what they actually do when they get there p. 29"
January 1, 1970
https://en.wikiquote.org/wiki/Arthur_C._Clarke