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Indigenous peoples in Africa - The Nomads

Migrating nomadic shepherds are still living around the Great Rift Valley in East Africa.

Historia de la iluminación

Nowadays it is perfectly natural to turn on the lights. But it has not always been that way.

Nets of a cuboid

This animation demonstrates the different nets of a cuboid and includes a game.

Cuboid

A cuboid is a polyhedron with six rectangular faces.

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