A look inside Iceland's Eyjafjallajökull volcano, this papercraft is presented by the British Geological Survey (Natural Environment Research Council) and depicts a cross-sectional view of the volcano.
Ammonites are the coiled and chambered fossil shells of extinct mollusks / cephalopod having a spiral shell.
Prabu Kresna goes scientific on us with this gravimeter papercraft (aka gravitometer) - an instrument used for measuring gravitational field.
Michael Dazzo's wind tunnel papercraft - a tube like structure where wind produced by a large fan is blown over a test object to test for aerodynamics.
Designed by Haruko Takaku, this papercraft model explains the principles of Earthquake phenomena.
Designed by Soyeon Kim, here's is a papercraft structure explaining the goings-on inside a hydroelectric power plant. 
A 1/6th scale of the GOTO Inc's GSS Chronos Planetarium
, designed by Toshimasa Mitsutake. GOTO's main site is in Japanese, but we give them brownie points for providing an english version.
Learn more about the parts and inner workings of the sun with this Solar Globe / Sun papercraft from Canon Creative Park., when a planetary system revolves around a star then it is called a sun ^^
