What is the most frightening thing that's ever been discovered for new planets or other galaxies?

What is the most frightening thing that’s ever been discovered for new planets or other galaxies?

Everything has something to do with the Question: IF THEY ARE OUT THERE, WHY HAVEN'T THEY VISITED? The prospects are the alarming part. According to Figuring Out Whether Aliens Exist: Possible Resolutions to the Fermi Paradox The Kardashev Scale: In 1964, Soviet astronomer and SETI researcher Nikolai Kardashev proposed a classification method for grouping species based... Read more