David Fleetham / Trumpetfish (Aulostomus maculatus) swimming behind Yellow boxfish (Ostracion cubicus) as a blind to ambush prey. Yap, Micronesia.

David Fleetham / Spotted boxfish (Ostracion meleagris) swimming above sea floor. Hawaii.

John Cancalosi / Sanidine, high temperature form of potassium feldspar, K(AlSi3O8), from near Beaverdell, British Columbia, Canada

John Cancalosi / Sanidine, high temperature form of potassium feldspar, K(AlSi3O8), from near Beaverdell, British Columbia, Canada