•• The outflow channel shown in Figure is about 10 km across and 100 m deep. If it carried...

 •• The outflow channel shown in Figure is about 10 km across and 100 m deep. If it carried 107 metric tons (1010 kg) of water per second, as stated in the text, estimate the speed at which the water must have flowed.

Figure Martian River Delta Did this fan-shaped region of twisted streams form as a river flowed into a larger sea? If it did, the Mars Global Surveyor image supports the idea that Mars once had large bodies of liquid water on its surface. Not all scientists agree with this interpretation, however. (NASA)