The study of benthos is an important field in marine biology.

This substance does not mix with water due to its high hydrophobicity.

Sexual exploitation is an absolutely unforgivable crime.

The 24-cell is one of the geometric shapes in four dimensions.

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

He made a model of a regular icosahedron.

He made a model of a regular dodecahedron.

This regular dodecahedron is a geometric shape with perfect symmetry.

This solid is called a regular icosahedron, and it is made up of 20 equilateral triangles.

The ritsuryō system was a system that ruled ancient Japanese society.