Einstein proposed the theory of relativity.

The War in Iraq affected many people.

Please research the interaction between these two drugs.

This area is severely arid, making it difficult for plants to grow.

My younger sister got chickenpox last week.

They got involved in an argument about politics.

Their trio enchanted the audience.

He is good at playing Beethoven's concertos.

My heart is healed by the beauty of mountains, rivers, plants, and trees.

Beautiful cirrostratus clouds were spread across the sky.