Aliens may have visited us already but we missed it: Nasa scientist

In a research paper, Silvano P Colombano, a computer scientist at Nasa suggests that aliens may look vastly different than the expectations that humans have of them. "The size of the ‘explorer’ might be that of an extremely tiny super-intelligent entity,” he hypothesised. He said that we need to revisit the possibility that interstellar travel is already feasible for extraterrestrials.

from Times of India https://ift.tt/2EiAYJ0