“The intriguing possibility is they are, in fact, here, but we just don’t know it,” said Andrew Fraknoi, the emeritus chairman of the astronomy department at Foothill College who recently taught a course on aliens at the University of San Francisco’s Fromm Institute and believes space aliens could very well be microscopic or unrecognizable as a life-form…

“In all the mathematical models, a species that started early in the history of the galaxy and had the will and resources to diffuse could by now have filled many parts of the galaxy with its artifacts or biological spores,” Fraknoi said.

The otherworldly speculation comes after the recent discovery of two interstellar objects zipping past Earth prompted a surge of interest among scientists in space travel and alien civilizations.