Scientists have made a big discovery: they observed the waves in the fabric of spacetime called gravitational waves. This event is a confirmation of a the general theory of relativity. This experiment opens an unprecedented new view of the cosmos
LIGO stands for Laser Interferometer Gravitational Wave Observatory because this "observatory" uses laser rays to detect cosmic events..
However, in the same way that we are observing distant events and activities, some other aliens may be observing us and analyzing what we are doing.
Maybe some distant cosmic astronomers are thinking that the huge dimensions of the interferometer —actually 4 km by 4 km— is for sending signals or messages instead of its real use of "collecting" information. Add to this that the "observatory" consists of two perpendicular "arms" constructed at exactly 90 degrees, the LIGO construction looks like a huge rectangular triangle when seen from above.