How did Mars lose its water?

Answer 1

Two chief reasons :

low mass = low gravitational attraction.

no magnetic field around Mars ... thus solar wind strips air, so water evaporates faster, and water molecules are also subject to solar wind erosion.

Answer 2

All the water evaporated. Mars is not a very hot place but the atmosphere is thin and the boiling point of water is quite low when the pressure is low. Mars is not very massive so its gravity field was not strong enough to retain the water, or most of the atmosphere. To make it worse the atmosphere is 95% carbon dioxide which would have trapped the Sun's heat.

Answer 3

Mars is believed to have some ice beneath its surface. During the Martian summer some of that ice may melt and briefly flow over the surface before boiling away in the low-pressure atmosphere.

Answer 4

Mars likely lost its water over time due to a combination of factors such as its thin atmosphere, lack of a strong magnetic field to protect against solar wind erosion, and geological processes like volcanism that released water vapor into space. These processes would have contributed to the gradual loss of Mars' water and transformation into the dry, barren planet we see today.

Answer 5

Well it disappeared because it is too cold on mars so it froze and formed the polar ice caps.

Answer 6

it floted away