Heavily Cited Scientific Journal
Puzzle 3 of City Nicknames Hard Pack
Question is: Heavily Cited Scientific Journal
and the answer is: NATURE
Word Meaning:
NATURE — (uncountable, often capitalized) The way things are, the totality of all things in the physical universe and their order, especially the physical world in contrast to spiritual realms and flora and fauna as distinct from human conventions, art, and technology.
Definitions from Wiktionary.