First Sentence
One hundred years ago, the mention of Mars called forth visions of unearthly blue-green vegetation, canals built by unknown civilizations, and malevolent invaders bent on colonizing our planet. Read the first page
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These are the most frequently used words in this book.
above
across
age
ago
ancient
area
atmosphere
bright
canyon
channels
craters
dark
days
deposits
desert
different
down
dunes
during
dust
early
earth
enough
even
example
face
features
few
first
floor
flow
form
formed
found
ground
gullies
high
ice
idea
image
impact
km
large
lava
layers
left
life
major
map
mariner
mars
martian
material
may
meters
mgs
might
mission
nasa
new
noachian
old
part
photos
plains
planet
polar
probably
region
researchers
right
rim
river
rock
science
scientists
sediments
see
seen
shows
soil
space
still
surface
system
team
terrain
time
top
two
underground
vallis
view
viking
volcanic
wall
water
wind
years
young
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