In article , "Dan Luke"
writes:


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.
--

Then we better get started.

Don

--
Wm. Donald (Don) Tabor Jr., DDS
PP-ASEL
Chesapeake, VA - CPK, PVG