Thanks Craig,
Your answers are right on the mark
.
Spectroscopy is used to find out the chemical composition of stars can't they use it to find out the ratio of dry ice to water ice.Or is this a very difficult process.
Lets use a little imagination here.Suggest there was a lot of water on mars creating the river valleys and other geological features,How could it all disappear,just like that.
Just wondering, Can you have life that can breathe co2 on earth?
I know trees can but they also need oxygen during the night but then again they make oxygen so maybe its just a big cycle.
cheers Orestis
