It's important for teenagers to have their own opinions.

Learning about the history of the Iron Age is very interesting.

How did people live in the Stone Age?

The labia majora, which is a part of the female reproductive system, covers the parts that are visible from the outside.

The Phanerozoic eon is the most recent era in the history of the Earth.

He is pretending to know nothing, playing the fool.

I saw a grey plover flying at the beach.

Writing the Chinese character '大' is difficult.

What is the title of this book?

He remembered the guillotine from the time of the French Revolution.