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61Geography of Mexico — Geographic coordinates: 23°00′N 102°00′W / …
62Mount Tambora — Aerial view of the caldera of Mount Tambora Elevation …
63Stratovolcano — Mount Fuji, an active stratovolcano in Japan that last erupted in 1707–08 …
64Pacific Ring of Fire — The Ring of Fire redirects here. For other uses of the term, see Ring of Fire (disambiguation). The Pacific Ring of Fire (see below) …
65Royal Academy of Music — Infobox University name = Royal Academy of Music image size = caption = latin name = motto = established = 1822 type = Public staff = president = HRH The Duchess of Gloucester principal = Professor Jonathan Freeman Attwood KBE students = 730cite… …
66Blue moon — This article is about the astronomical phenomenon. For other uses, see Blue Moon (disambiguation). 31 December 2009 Blue Moon with partial lunar eclipse A blue moon can refer to the third full moon in a season with four full moons …
67Global dimming — is the gradual reduction in the amount of global direct irradiance at the Earth s surface that was observed for several decades after the start of systematic measurements in 1950s. The effect varies by location, but worldwide it has been… …
68John Christy — Infobox Scientist name = John R. Christy image width = caption = birth date = birth place = California, USA death date = death place = residence = nationality = American field = Atmospheric Scientist erdos number = work institution = University… …
69Guarea — Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots …
70Mineral redox buffer — In geology, a redox buffer is an assemblage of minerals or compounds that constrains oxygen fugacity as a function of temperature. Knowledge of the redox conditions (or equivalently, oxygen fugacities) at which a rock forms and evolves can be… …
