oceanographer

paleontologist

conservationist

thermodynamics

geometrist

ecologist

cosmologist

biochemistry

electronics engineer

anthropologist

archeologist

entomologist

naturalist

botanist

geologist

biologist

aeronautics

mathematician

bacteriologist

metallurgist

pathologist

meteorologist

calculus

physician

astronomer

mineralogist

radiologist

statistician

geophysicist

sociologist

physiologist

forester

zoologist

hydrologist