Opinion: Are space aliens real, and have they visited us?

Sometimes, "unidentified" means just what it sounds like.
Sciencing on MSN

Science fiction vs. science fact: Alien life might be just as strange as Project Hail Mary makes it out to be

"Project Hail Mary" really pushes the limit when it comes to non-humanoid aliens. But researchers posit that real aliens could be even stranger than that.