The existence of dark matter has not yet been fully proven.

He is working as the mainstay of his family.

He is a true patriot, always working hard for the country.

The Kingdom of Denmark is a beautiful country located in Northern Europe.

Imperialism has played a significant role in history.

He is thought to be a cruel person.

In physics, blackbody radiation is a very important concept.

Please tell me the details of the project's progress.

Beautiful colored carp (koi fish) are swimming in my garden.

The little owl is a nocturnal bird that mainly eats small mammals and insects.