Aliens wouldn't really invade us, would they?

“Anything that we have here, they could find where they live,” Shostak said. If there was a resource found on Earth that did not exist on the aliens’ home planet, there would certainly be easier ways to get or make the resource than coming here.

And if an alien civilization was advanced enough to engage in interstellar travel, they would also probably have very advanced robotic machines, Shostak said. If they wanted to research our planet, they would be more likely to send those machines here than to come here themselves.

“It’s not like, the hatch will open and we’ll see a strange, alien paw coming out,” he said. “It’s more likely to be a robotic arm.”