Once upon a time, a frog was hopping around in a pond.

Alkaline earth metals are one of the main components of the earth's crust.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

This circle looks perfect.

I'm thinking of having Mapo tofu for dinner today.

I went to see a vaudeville show.

I had the leftover food at the restaurant put in a doggy bag.

Alkaline earth metals are located in Group 2 of the periodic table.

I enjoyed sandboarding at the sandboarding dome.

I love doo-wop music.