The special theory of relativity is a theory proposed by Einstein.

Learning about the ancient special kana usage is very important for understanding ancient Japanese.

The Jōdai Tokushu Kanazukai is one of the notation methods of ancient Japan.

The arctic tern is known for its long-distance flights.

The Arctic Tern, also known as 極鯵刺, can be seen in the Arctic region.

Cytogenetics is a science that studies the structure and function of chromosomes and genes.

Cone cells are the main visual receptors for recognizing colors.

The cytosol is the liquid part inside the cell, and many enzymatic reactions occur here.

Microglia are immune cells in the brain, playing a role in maintaining the health of the nervous system.

Neuroglia play an important supporting role in the nervous system.