Encyclopedias, Almanacs, Transcripts, and Maps
- Kenneth Thompson
- Kephalomancy (or Cephalomancy)
- Kephu
- Kepler College of Astrological Arts and Sciences
- Kepler's Sphere-Packing Conjecture Is Finally Proved
- Kepler’s Laws
- Kerala Caecilians: Uraeotyphylidae
- Kerheb
- Kerner, Justinus (Andreas) (Christian)(1786-1862)
- Kether
- Ketogenic Diets
- Kettner, Frederick (d. 1957)
- Key Inventions in the Textile Industry Help Usher in the Industrial Revolution
- Key Mathematical Symbols Begin to Find General Use
- Key of Solomon the King (Clavicula Salomonis)
- Key Scientific Research Institutions Are Founded
- Keyhoe, Donald Edwards (1897-1988)
- Khaib
- Khérumian, Raphaël (1903-)
- Khu