Mars: ancient water, ancient life?

Question

There is no real evidence of an ancient Martian civilization, but after rewatching a "Cosmos" episode in which Carl Sagan left the possibility open that there may be evidence of agricultural plains on the Mars surface dating back a billion or more years ago, I'm intrigued by the thought that the red planet could have at one time been an Earthlike world, with some form of intelligent life.

I'm asking two questions (please answer both or either):

a/ Sci-fi fantasies and wild speculations aside, how likely do you personally think it is that Mars at one time had flowing water and some type of intelligent life?

b/ According to Sagan, Earthlings may one day "terraform" Mars into a habitable place for human beings, which, he said, could take a thousand years or more. However unlikely it is, would you allow it's possible that the Earth underwent the same type of induced terraforming process millions of years ago?

Answer 1

Who knows maybe we are from mars, the sphinx age is not determinable and we may have blown ourself back into the stone age after coming here.

Answer 2

A/ According to studies done on mars, experts have found out that mars used to have vast oceans of liquid H20 (Water) and also rivers. Not only that but about 85% of the planet was covered in water.
This lead to only one thing, mars used to orbit the sun at a much closer range, but due to a change in its orbit, mars propably flew away from the sun and the oceans froze at its North and South pole caps.

But where did all the other water go? For crying out loud the planet was nearly drowned in it. So scientists think that the water found a way under the surface of mars and by any luck, it's still liquid. Now immagine when mars was nearer to the sun, Small bacteria-like lifeforms started to form, they might still be some left under the surface.

But unfortunately there can't be any 'intelligent' lifeforms living on it, because since all the planets in our solar system where made at nearly the same time, mars could not have developed alot of life on it before going further away from the sun, and even so, Its hard to get intelligent under the surface of a cold planet.

But lets let our immagination run free... Mars is as old as earth, so MAYBE primitive lifeforms did evolve under its surface? and have learned to dwell there?

B/ I belive that if earth was going to explode and we could teleport ourselves to one planet to survive, a wise choice would be mars. Mars is very earth-like and isnt as cold as the outer planets, nor as hot as mercury and venus. But the air on mars is toxic for us humans and living there would be difficult, especially right now. I believe that in the far future, they would build a small spacestation set up on mars and it can act as a hotel for the rich to go for a holiday there, but thats all.

ABOUT THE ATMOSPHERE:
The atmosphere of Mars is relatively thin; the atmospheric pressure on the surface is only 0.7–0.9 kPa, compared to Earth's 101.3 kPa. The scale height of the atmosphere is about 11 km, somewhat higher than Earth's 6 km.

MARS's Atmosphere
The atmosphere on Mars consists of 95% carbon dioxide, 3% nitrogen, 1.6% argon, and contains traces of oxygen and water.

EARTH's Atmosphere
It is 78% nitrogen and 21% oxygen, with trace amounts of other gaseous molecules such as water vapor.

People should remember that we are living on a big beautiful planet, that provides us with what we need to survive, its our home. But unfortunately people are showing more interest in learning about the universe then about our own planet. We know more about the surface of venus than we know about the bottom of the ocean on earth. We are continually destryong the earth due to greed and nothing is being done about it.

So before planning to do anything with other planets, we should fix out world. Before it fixes us.

Answer 3

with regard to existence on Mars (not the Bowie song) i could be loathed to assert that there replaced into sensible existence there without evidence of a minimum of microbes present there those days. existence is exceedingly adaptable and that i douby even an in simple terms approximately thoroughly frozen international could ever truthfully replace into ineffective if existence had as quickly as thrived there - right here in the international there are countless eco-structures which stay to tell the story without image voltaic and a few lichens can advance at sub-0 temparatures. As regardingthe terraforming of historical earth i don't think of this took place as lots of the fundamental components of existence consisting of water could have take place without intervention. I do think of that evolution replaced into conciously guided with the aid of an exterior impact yet i don't think of the planet replaced into conciously altered after its formation in any way.

Answer 4

There was water and there is still water possibly iunderneath the surface of the mars.

I doubt any intelligent life was there. some kind of bacterial life form could have existed.

Future anything is possible. given enough time anything could happen. No one can guess what exactly will happen.

No It didnt happen on earth.

Answer 5

actually it is a known fact that they found oxygen in rocks on mars and there are canyons that appear to have been worn away from water flowing (like our Grand Canyon)