- ... that the Gregory Rift in East Africa contains the world's only active carbonatite volcano, Ol Doinyo Lengai (pictured)?
- ...that one way to calculate distances in terms of latitude and longitude is the Haversine formula?
- ...that the supercontinent Pannotia only lasted about sixty million years before disintegrating into four continents?
- ... that the 2002 Sumatra earthquake is considered to be a foreshock of the 2004 Indian Ocean earthquake?