Could the earth have ever been completely land with the ocean hundreds of miles under land?

Scientists have discovered evidence of a vast water reservoir trapped hundredsof miles beneath the surface, capable ... Scientists have been looking for this missing deep water for decades. ... "If [the stored water] wasn't there, it would be on the surface of the Earth, and mountaintops would be the only land...

The processes that mold ocean basins occur slowly, over tens and hundreds of ... About two-thirds of the earth's land area is found in the Northern Hemisphere, which ... the planet would have been so hot that all the water would have evaporated into ... . At 7.27 million square miles (18.83 million square kilometers), the new ... .

But how did they get there and is there anything we can do? ... In fact, Earth's largest landfill isn't on land at all. The Great Pacific Garbage Patch stretches for hundreds of miles across the North Pacific Ocean, ... . Plastic has also been shown to absorb pre-existing organic pollutants like PCBs from the ...

Canada has 202,080 kilometers (125,567 miles) of coastline. ... It would be hundreds of years before another culture explored the ocean to this ... from microscopic algae to the largest creature to have ever lived on Earth, ... Plants such as seagrass are similar to land plants—they have roots, stems, ... ... Grades 5 and under ...

The coastal landscape is ever-changing. ... Although coasts account for only 10 percent of Earth's land surface, they serve as ... is known as an emergent coast, an area that was formerly under water and has gradually ... .. Depending on the action of waves, sand on a beach may travel along the shore hundreds of feet a day.

A football field–sized area of land is being washed away every hour, and lawsuits are being ... The effects would be felt far beyond bayou country. ... They say their grandchildren don't understand what has been lost. ... Some 27,000 square miles went under as much as 30 feet of water, destroying 130,000 ...