"Wdtabor" wrote:
No, we simply came to understand (some of us) that manned
space travel is unconscionably wasteful until we get past
rocket ship technology, which may take decades.
--

It will never happen if we do not create the need for it by reaching
the limits of rocket technology.

I submit that we are already at the practical limits. One of the things
that make a manned trip to Mars so expensive is the long exposure of
astronauts to conditions in space. Tremendous amounts of r&d will be
required to protect them from the physiological effects of zero gravity
and radiation.
--
Dan
C172RG at BFM
(remove pants to reply by email)