Dr. Silvano P. Colombano has what might appear to be some eccentric theories about alien life having visited Earth. Yet he isn’t just some crackpot pseudoscientist; indeed, he actually works for NASA. And in a recent report, the researcher has suggested that extraterrestrial beings may have once been here on our planet.
Colombano is, of course, far from the only scientist to have pointed towards the existence of alien life. In fact, there is even an equation that was formulated to encourage discussion surrounding the search for such life. Known as the Drake equation, it’s applied to approximate the number of potential alien civilizations in our galaxy, the Milky Way.