How could most of the water on earth disappear?

Most of the water on earth disappeared around approximately between 3.8-4 billion years ago because -: high temperature . breakdown of water for formation of oxygen and other organic molecules which was to be required later for what we know today as LIFE. read more

Water can dissapear from a planet if that planet lacks the gravity to prevent water vapor from blowing away by Solar Wind. Canada apparently has enough gravity to pteventvthis . It eould appear that Mars does not. read more

Although water covers 70 percent of the Earth's surface, water is actually a rare substance that represents just 0.05 percent of the Earth's total mass. read more