[Bob434]

[[Its because given the laws of physics and the unfathomable enormous distances to even the nearest star, no alien biological or mechanical entity could ever reach earth.]]

Not to mention the incredibly high cost of fuel- imagine how much it would cost to skip across the galaxy?

[neverevergiveup]

“Not to mention the incredibly high cost of fuel- imagine how much it would cost to skip across the galaxy?”

What if a way to control gravitational forces were discovered, such that one could alternatively make objects of mass attract each other, then repel each other. We don't understand gravitational force - but what if another intelligent life figured out how to manipulate gravity?

[doorgunner69]

Not to mention the incredibly high cost of fuel- imagine how much it would cost to skip across the galaxy?

Gas is probably still $0.17 a gallon out there.