either
a earths outer core
b the southern lughts
c volcanic rocks
Camels
spectrographs
Learn about the earth's past.
Archaeologists
Archeologists.
so they can learn more things about it.
cuz they are explorers
Scientists study stellar spectra to learn about their properties such as temperature, chemical composition and relative chemical abundances, radial velocity, rotational speed etc.
Scientists study fossils, ancient tools, and DNA to learn more about early humans. By comparing and analyzing these sources of evidence, scientists can piece together information about the behavior, lifestyle, and relationships of our ancestors.
Geology
they learn by going to a good school and study the stars and planets
Their bone structure from fossils and their morphology