The message is pretty daft as well, (as pointed out by the article) if there are any Martians around to hear the massage and understand it, it could easily sound Like a prelude to a human invasion.
Hello. This is Charlie Bolden, NASA Administrator, speaking to you via the broadcast capabilities of the Curiosity Rover ...
Since the beginning of time, humankind’s curiosity has led us to constantly seek new life … new possibilities just beyond the horizon ...
The knowledge we hope to gain from our observation and analysis of Gale Crater, will tell us much about the possibility of life on Mars ... Curiosity will bring benefits to Earth ... as it prepares the way for a human mission in the not too distant future.
Judge for yourself
I know that message would scare the hell out of me if it was broadcast by an alien object that landed here :o
Space isn’t a true vacuum … but you’re right, it’s thin enough that sound wouldn’t travel.
Mars has a thin atmosphere of mainly carbon dioxide (95%) with small traces of other gasses including 0.13% Oxygen … Mars has a mean surface pressure of 0.006 of Earths, so it’s VERY thin, but enough to carry sound.
But if your ears were suddenly exposed to that low of a pressure … I think you’d be slightly too distracted to listen to what the curiosity rover was saying