The debate on whether we should contact aliens or not has been taking place at the American Association for the Advancement of Science (AAAS) in San Jose, California.
The latest data collected by Nasa and other space agencies suggests there could be as many as 40 billion potentially habitable planets in our galaxy, the Milky Way.
Proponents of Seti (Search for Extraterrestrial Intelligence) have said we should consider Active Seti - sending out messages, rather than just listening, in the hope someone is out there.
However, physicist and author Dr David Brin, speaking at the event, was one leading the call for caution rather than contact.
‘Is there a chance, however small, that in making itself known to aliens, humanity could be about to make a colossal mistake?’ he said, according to The Times.
‘It we live in this jungle neighbourhood where it’s quiet, and if you are a toddler, it’s best to talk it over with the other toddlers before screaming yoo-hoo!’
His views follow similar cautionary tales from esteemed scientists such as Professor Stephen Hawking.
Last year, Professor Hawking warned against inviting an unwelcome visit from aliens, pointing out: 'The outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans.'
Nonsense. They are already here, and have been here since the beginning of human civilization, and we're still here. Wake up. To read more, click here.