Explanation: How much of planet Earth is made of water? Very little, actually. Although oceans of water cover about 70 percent of Earth's surface, these oceans are shallow compared to the Earth's radius. The above illustration shows what would happen if all of the water on or near the surface of the Earth were bunched up into a ball. The radius of this ball would be only about 700 kilometers, less than half the radius of the Earth's Moon, but slightly larger than Saturn's moon Rhea which, like many moons in our outer Solar System, is mostly water ice. How even this much water came to be on the Earth and whether any significant amount is trapped far beneath Earth's surface remain topics of research. Visit http://apod.nasa.gov/apod/ap120515.html
I believe that the scientists’ research effort needs to be made - before they do anything else, first from the creation account of universe recorded in the Bible.
Here is the answer to their questions above;
9 Then God said, “Let the waters below the heavens be gathered into one place, and let the dry land appear”; and it was so.
10 God called the dry land earth, and the gathering of the waters He called seas; and God saw that it was good (Genesis 1:9-10).
Our prayer : Lord Jesus, thank You for allowing the Water of Life for us!
“The Spirit and the bride say, "Come!" And let him who hears say, "Come!" Whoever is thirsty, let him come; and whoever wishes, let him take the free gift of the water of life.” (Revelation 22:17) Amen!