It is formally known as geography but is
really of anthropology & Topography.
Someone who studies the earth is called a geologist....
geography
The study of earth and it's people is called geography. not no dua
Geologists
Yes they did
geographers study the earth, its landforms, landmarks, natural resources, and etc.
If you think that there are only two people living on the surface of the Earth, you are seriously out of touch. In any event, not to deprive you of an answer, the study of the Earth's surface is geology, and the study of the people living on the Earth (more than two) is anthropology.
Geography
geography
Ecologists study how living organisms and the earth interact with each other.
they learnt about the Earth's surface etc.
Geology, Paleontology and Anthropology will cover this.