Understanding dynamical systems is an important part of physics.

The Japanese imperial family line is said to have the longest history in the world.

She often reads books on spirituality.

She is deeply devoted to the New Age spirituality.

He loves 'Narou-kei' novels and reads them every day.

According to the law on specified alien species, the import of certain organisms is prohibited.

He is writing a thesis on the theory of general relativity.

Paleoecology is a field of study that investigates the relationship between past organisms and their environment.

He is an expert in paleoecology, pouring his passion into studying past ecosystems.

He always proactively suggests new ideas.