I am interested in entomology.  Are you?
That's the study of insects, so yuck! LOL!
Lol I know it is not for everyone.  It is fascinating though.  I started in school and ended up studying it in uni.  
Seems in the past it included other groups also, such as spiders, earthworms, land snails and slugs.
That is right. Not so much now though.  I did do a major study involving slugs in uni though Im sure you dont want to hear about it! lol
It seems it overlaps wiht a lot of topics though, like biochemistry, ecology, and even paleontology.
thats true.  In school I completed all science subjects then ended up doing my major in uni in entomology.  I am currently studying the behaviours of bees.  Luckily I have managed to avoid being stung so far.  My colleagues cannot say the same!
So do you then work with them in an apiary or bee yard?