Paleontologist-studys fossils of once living organisms Geologist-studys rocks Geochemist-studys the creation of rocks Volcanologist-studys volcanoes Entomologist-studys insects Biologist-studys living organisms Botany-study of plants Zoology-study of animals Bacteriology-study of bacteria Ecology-study of relationships among organism & their physical environments Histology-study of tissues which make up the body Mycology-study of fungi Morphology-a branch of biology that deals with the forms and structure of plants & animals Photochemistry-study of chemical changes involving light Physics-study of matter & energy
You can use both variations. Wiktionary lists "time-travel" as an alternative spelling to "time travel", so it seems "time travel" is the more common version.
Any link between time travel and chemistry.
Time travel is not possible, so it's not dangerous at all.
He never even mentions time travel.
A selenographer studys maps of the moon.
Botanists are people who study plants and nature.
Geology.
a cryologist
Geology.
Astronomer
a botanist
Oceanographers o
a person who studys biographics
The sun has a estimated lifetime of about 5 billion years remaining before it exhausts its nuclear fuel and dies.
A seismologist is aperson who Studys Earthquakes!
he studys geography