1. Kalahari desert, 1
2. Kellogg, William, 1
3. Kelvin, William Thompson, Lord, 1, 2 n. 4
4. Kelvin scale, 1 n. 10
5. Kennedy, Jackie, 1
6. Kepler, Johann, 1
7. Keynes, John Maynard, 1
8. Khufu, Pharaoh, 1
9. King, Augusta Ada, Countess of Lovelace, 1 n. 3
10. Kourou, French Guyana, 1
11. Krebs cycle, 1, 2
12. Kuiper Belt, 1 n. 2