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Who were the Moche? South American history

By |2018-04-19T15:03:12+00:00September 9th, 2017|History, South America|

Moche portrait of a blind man, 400-500 AD (thanks to Oberlin College) The collapse of the Chavin state in Peru, about 250 BC, seems to have opened the way for the Moche and the Nazca to develop states of their own. The Moche started up around 100 AD along the Pacific coast of South America, in what is now northern Peru. The [...]

What is a pyramid? Square pyramids

By |2017-07-29T11:57:36+00:00July 29th, 2017|Math|

A pyramid with a square base. A pyramid is a three-dimensional solid form made out of triangles. Some pyramids also use a square. There are two common kinds of pyramids: triangular pyramids that you make by fitting four triangles together, and square pyramids that you make by fitting four triangles together on a square base, like the [...]

Geometry made easy!

By |2018-04-23T16:00:35+00:00July 29th, 2017|Math|

This is an equilateral trangle. The simplest geometric idea is the point, and then the line, the plane, and the solid. Shapes like circles, squares, rectangles, and triangles are flat, and we can think of them as being parts of a plane, flat like a drawing. Shapes like spheres, cubes, and pyramids are solid, and we can think of them as being part of the whole universe [...]

How to build a pyramid – Ancient Egypt

By |2018-04-19T12:10:03+00:00June 13th, 2017|Africa, Architecture, Crafts, Egypt|

Pyramid project: building a sand pyramid A pyramid project Ancient Egyptian pharaohs, like Mayan lords, built pyramids because they're a pretty easy shape to build. Pyramids are especially easy to build if they are mostly solid piles of dirt or stone. That's what the early pyramids were like: mostly solid. Build a pyramid [...]