Paper Planes and Helicopters


This plane produces tremendous lift at low speed, giving it a very low glide slope.
It is an excellent indoor flier and will coast across the room on slow, smooth glides.
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The helicopter is a classic design that spins rapidly as it descends. It works
great when dropped from a high place. Try different amounts of weight on the
bottom tab. Notice that the helicopter spins in different directions depending on
which direction the rotors are folded.



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Here be dragons

“Here be dragons” means dangerous or unexplored territories, in imitation of a medieval practice of putting illustrations of dragons, sea monsters and other mythological creatures on uncharted areas of maps. (wiki)

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The 1265 Psalter world map:

mappa mundi


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The 1265 Psalter world map explained in detail here at the British Library. (click on “explore themes”)