What is meant by the "shot heard round the world"? Explain using information previously learned.

The shot heard round the world" is a phrase that refers to the opening shot of the battles of Lexington and Concord on April 19, 1775, which began the American Revolutionary War and led to the creation of the United States of America.

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)