Natural Sciences 2021

Natural Sciences, published by QS World University Rankings, evaluates universities worldwide using key indicators such as Academic Reputation, Employer Reputation, each assigned a distinct weight according to a publicly documented methodology. Data sources combine academic peer reviews, employer surveys, bibliometric databases such as Scopus and Web of Science, and institutional self-reported statistics, all independently verified by the publisher's research team. The 2021 edition assessed 498 universities from 24 countries and regions, covering teaching quality, research output, internationalization, and graduate employability across undergraduate, master's, and doctoral programs. QS World University Rankings recollects raw data annually and cross-checks results to ensure the rankings reflect each institution's most current performance in faculty strength, scholarly productivity, global reach, and student outcomes, providing a reliable reference for prospective students, parents, and education researchers.

The top universities in Natural Sciences 2021 are: Aarhus University, University of Lisbon, University College Dublin, University of Hawaiʻi at Mānoa, City University of Hong Kong. This edition, published by QS World University Rankings, evaluated 498 universities from 24 countries and regions using indicators such as Academic Reputation, Employer Reputation. Rankings reflect weighted performance across multiple dimensions; students should consider methodology differences and their own academic priorities when interpreting results.

QS World University Rankings, published by Quacquarelli Symonds since 2004, are defined by their heavy emphasis on reputation surveys: academic reputation (30%) and employer reputation (15%) together account for nearly half of the total score, directly reflecting how scholars and employers worldwide perceive each institution. Additional indicators include faculty/student ratio (10%), citations per faculty (20%), international faculty (5%), international students (5%), plus newer dimensions such as sustainability and employment outcomes. In contrast, THE emphasizes teaching environment and research quality, ARWU relies entirely on objective research output (Nobel Prizes, publications), and US News focuses on research reputation and citation impact. QS is therefore particularly useful for applicants concerned with institutional prestige, graduate employability, and cross-border recognition.