Alex Skjong

It’s time for a visit to the beach and trip back in time to the Middle Ages. Do you think knights wore their armor as sunscreen?Research LinksSandNature.com — What is Sand Made of? History.Sand Atlas — Sand TypesHowStuffWorks — How Sand Dunes WorkNPR — Which Is Greater, The Number Of Sand Grains On Earth Or Stars In The Sky?CastlesHowStuffWorks — How Castles WorkExploring Castles — Castle Designs Through History: From Simple Mounds to Fairytale MajestyKiwico — The Science Behind: Sandcastle Building

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