[Sam Cree]

I had a thought that would get us around the Fermi paradox.

Aliens may have arrived near earth before we had the ability to track orbiting probes. They may well have removed them if their intentions are to not announce their presence.

What exactly is a propulsion engineer? Does that mean you work with rockets? I suppose, perhaps incorrectly, that man is not going very far from the solar system until we have a radically different technology than rockets.

[boris]

"What exactly is a propulsion engineer? Does that mean you work with rockets?"

My boss thinks so.

--Boris