[GingisK]

Until E=MC2 is thrown into the ash heap of history, interstellar flight is not realistic.

I majored in physics. I am confident we don't know everything about the universe, let alone esoteric physics.

Knowledge is the measure of the radius of the sphere of ignorance.
---Albert Einstein

Imagination is more important than knowledge.
---Albert Einstein

[SunkenCiv]

well put.

“I’ve learned to live with not knowing.” — Richard Feynman

[Quix]

INDEED.

AT LEAST EINSTEIN

was smart enough to be humble about what he knew and more importantly about what he didn’t know.

Much more than can be said for virtually every naysayer I’ve seen rant on these threads.