Columbia subject headings:
Aristotle.
Astronomy.
Mathematics.
Philosophy, Ancient.
Thales, approximately 634 B.C.-approximately 546 B.C.
Harvard subject headings:
Aristotle
Philosophy, Ancient.
Thales, approximately 634 B.C.-approximately 546 B.C.--Contributions in astronomy.
Thales, approximately 634 B.C.-approximately 546 B.C.--Contributions in mathematics.
Princeton subject headings:
Aristotle.
Philosophy, Ancient.
Thales, approximately 634 B.C.-approximately 546 B.C.--Contributions in astronomy.
Thales, approximately 634 B.C.-approximately 546 B.C.--Contributions in mathematics.