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Language: en
and now for some final thoughts on space
travel in the early days of the great
ocean voyages the explorers and
Shipmates were Brave or crazy during
their year-long voyages they risked and
often succumbed to scurvy dehydration
starvation disease pestilence hostile
Natives and of course shipwreck these
were the known challenges add some
mysterious unknowns like is Earth's Edge
just over the horizon or demons lurk
there and you've got a voyage that few
if any of us would ever take yet Some
Humans Embrace these risks and our
species owes them boundless
gratitude with space as the next long
Voyage Frontier another laundry list of
life-threatening challenges await us
food spoilage Wayward space debris loss
of Health in zero g psychological
effects of isolation and once again
shipwreck now consider that in 1950 the
risk of asteroid fragments colliding
with your spaceship was not only unknown
it was undram of same holds for the
damage that solar flares pose to DNA of
space farers today these are known
unknowns we know they're out there and
even though we won't always know when
they strike we can in principle protect
against them but what's scarier than
known unknowns are unknown unknowns
stuff we haven't thought of yet but
would put an astronaut's health or life
at risk such as ha we haven't thought of
it yet that's why we call them unknown
unknowns and that's why to explorers
today we call them astronauts the
frontier will forever be the home of the
brave and that's the cosmic perspective