Science
What percentage of Earth has never been mapped by humans?
About 20 percent of the seafloor
Background
About 20 percent of the seafloor has not been mapped in high detail. The rest was slowly measured by ships using sonar. We have sharper maps of Mars than of the deep sea. So under water there is still a lot new to discover.
More Science questions
How many bones are in the human body?
See questionHow many layers does the Earth’s atmosphere have?
See questionHow many chromosomes do humans have?
See questionHow many moons does Mars have?
See questionHow many teeth does an adult human typically have?
See questionHow many electrons are in a neutral helium atom?
See question