The Why Files

Comparing Earth technology with alien civilizations | The Kardashev Scale (2021x16)

Ημερομηνία προβολής: Μάϊ 03, 2021

It's estimated that there are 40 billion Earth-like planets in the Milky Way that could support life. Certainly a few of these should have given rise to intelligent life. And if so, where is everyone?