Conversation so far:
Where did Isaac Asimov go to school?
Isaac Asimov attended New York City public schools from age 5, including Boys High School in Brooklyn.
Did Isaac Asimov further his education?
Graduating at 15, Isaac Asimov attended the City College of New York for several days before accepting a scholarship at Seth Low Junior College, a branch of Columbia University.
What did Isaac Asimov study at Seth Low Junior College?
Originally a zoology major, Isaac Asimov switched to chemistry after his first semester as he disapproved of dissecting an alley cat.
Where else did Isaac Asimov go to school?
Isaac Asimov attended at University Extension (later the Columbia University School of General Studies)
What did Isaac Asimov get bachelor degree in?
Isaac Asimov recieved his Bachelor of Science degree.
Was Isaac Asimov done with schooling after getting his bachelor degree?
Asimov applied to the graduate program in chemistry at Columbia; initially rejected, then accepted only on a probationary basis, he completed his Master of Arts degree in chemistry in 1941.
Are there any other interesting aspects about Isaac Asimov?
In between earning these two degrees, Isaac Asimov spent three years during World War II working as a civilian chemist.
Where did Isaac Asimov work?
Isaac Asimov worked at the Philadelphia Navy Yard's Naval Air Experimental Station.

Question: How long did he stay there?
Self-contained rewrite: How long did Isaac Asimov stay there?