What would you say to an alien?
Scientists in the US have said it is time to try and contact intelligent life on other worlds.
Researchers involved in the search for extra-terrestrial life are considering what the message from Earth should be.
The call was made by the Search for Extra Terrestrial Intelligence institute who've been listening for space signals for over 30 years.
Scientists are now going work out what the message will be and what to do if there were ever an answer.
So far there has been no sign of ET.