All the earth's land surface has been discovered. There are parts that are virtually unexplored, however.
one - fifth
Deserts account for 33-35% of the earth's land surface.
About one-third of the earth's land surface is desert.
The northern hemisphere has much more land than the southern hemisphere.
The area of Africa is about 30.2 million km² (11.7 million sq miles) This means it covers 6% of the Earth's total surface area and 20.4% of the total land area.
About one third of the land surface of the earth is desert.
about one fourth
Deserts make up 33% of the Land's surface
Deserts cover 33% of the land surface of the earth.
50%
If by land mass you mean the surface, then 99% is habitable.
Roughly 75% of Earths Surface is covered by water. (including the Oceans, lakes and land Ice).
Approximately 30% of the Earth's surface is covered by land, the remaining 70% of the surface is covered by water.
Asia represents about 30% of the land area of Earth, or about 9% of the total surface.
70% or 80% of water covers the earths surface
about 30%
Earths surface of gravity is 4.6m/s2 more than moons.