Only one type of gem is created naturally by a living animal: the pearl!
Read moreGlobal Positioning System
GPS Block IIA satellite orbits over the earth (Image by Scott Prater, Schriever Air Force Base, Colorado, November 2013; courtesy Defense Video and Imagery Distribution System).
Traveling this summer? Don't take GPS for granted!
Read moreChanges and a Changeless God
Our God is changeless, but that doesn't mean we can't grow and be changed by God.
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