Earth science is an important field of study for unraveling the mysteries of nature.

He is a world-renowned researcher.

When the earthquake occurred, he took emergency measures.

This love will continue eternally.

He took a deep breath and regained his composure.

I am an Earthling.

His actions are as meaningless as a rotten wood and dung wall.

In the Northern Hemisphere, summer is from June to August.

It is currently summer in the Southern Hemisphere.

We are searching for extraterrestrial life.