12 Possible Reasons We Haven't Found Aliens

Saturday, June 10, 2017 - 07:22 in Psychology & Sociology

liens should be common, yet there is no convincing evidence that they exist. So why haven't we found them?

Read the whole article on Live Science

More from Live Science

Latest Science Newsletter

Get the latest and most popular science news articles of the week in your Inbox! It's free!

Check out our next project, Biology.Net