He is known as an excellent theoretician.

Graph theory is a branch of mathematics that studies mathematical structures called graphs.

Information theory is a field of study that mathematically analyzes the amount of information and the efficiency of its transmission.

He has a deep interest in archaeology.

His dream is to walk in space.

His dream is to do a space walk.

He is passionate about exploring his own innerverse.

His dream is to pilot a spaceship.

The problem of space debris could potentially have a significant impact on future space development.

The study of cosmic rays may hold the key to unraveling the mysteries of the universe.