ETs March 18, 2019March 16, 2019 ~ susie An astronomer at Columbia Univ. has a new guess about how hypothetical alien civilizations might be invisibly navigating our galaxy. – @NBCNewsMACH https://t.co/1UdjZKmukX— NBC News (@NBCNews) March 16, 2019 Share this: Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Like this:Like Loading… Published by susie View all posts by susie
