Could an alien mothership be hovering around the solar system, sending out tiny probes to explore planets? According to a Harvard scientist and a Pentagon official, it's possible.
In a draft paper, the pair said it is feasible an extraterrestrial spaceship could be in our galactic neighborhood, exploring the region by the means of "dandelion seeds" — small spacecraft that can gather and send back information, similar to the way humans send out spacecraft to explore planets.
