The 正二十四胞體 is one of the regular polytopes in four dimensions.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

She is beautiful like a peony when she stands, a peony when she sits, and a lily when she walks.

This is a model of a mutetrahedron.

This is a model of a muoctahedron.

This mutetrahedron has a very unusual shape.

This is a 六角四片四角孔ねじれ正多面體, in other words, a muoctahedron.