I am spending the happiest days of all.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.

I am very interested in social science.

This is a historic building.

He is a famous historian and has written many history books.

How did the ancients live?

He is majoring in history at university.

He is trying to hide his embarrassing past.

The creatures of the ancient times were significantly different from the creatures of today.