In learning Japanese grammar, understanding the upper two-step conjugation is important.

The Mus musculus is widely distributed around the world.

The twenty-four divisions of the solar year, or 'Nijyushi Sekki', is a system that divides the year into 24 parts according to the changes in nature.

He was working on that project round the clock.

This is a model of a great icosahemidodecahedron.

This is the second time he's been late. Well, they say what happens twice will happen three times.

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.

World War II lasted from 1939 to 1945.

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