Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Gallery Physics and Astronomy
Explore Categories
  
SlideshowReport

Rivers on Mars and Earth
Download Without Watermark With Free Membership
Description
(a) Winding canyons on Mars, such as the one in this Viking 1 orbiter
image, appear to be formed by sustained water flow. This theory
is supported by the terraces seen on the canyon walls in
high-resolution Mars Orbiter images. Long periods of water
flow require that the planet’s atmosphere was once thicker
and its climate more Earthlike
Related Images
 839
 1443
 984
 1029
 1439
 2008
 929
 1036
 455
 563
Add Comment
Explore
Post your homework questions and get free online help from our incredible volunteers
  1022 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat