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 Links
Sand
Nature.com — What is Sand Made of? History.
Sand Atlas — Sand Types
HowStuffWorks — How Sand Dunes Work
NPR — Which Is Greater, The Number Of Sand Grains On Earth Or Stars In The Sky?
Castles
HowStuffWorks — How Castles Work
Exploring Castles — Castle Designs Through History: From Simple Mounds to Fairytale Majesty
Kiwico — The Science Behind: Sandcastle Building
