Discusses various Roman myths, with background information describing the history, geography, religious beliefs, and values of the culture that created the mythology.

Surveys the known history of King Arthur, the legends and lore surrounding him, his treatment in literature, and the possible historical background of his associates and stories.

A biography of the man who became the seventeenth president of the United States following the assassination of Abraham Lincoln, providing information on his childhood, education, family, political career, time as president, and legacy.

"Medical experts worldwide agree that the period spanning late 2020 and early 2021 will be remembered as one of the most consequential in the history of modern science. COVID-19, a devastating, contagious disease characterized by acute respiratory difficulties, raged across the globe. Multiple vaccines have now been designed to fight back against COVID-19 had been approved for use. Most often injected through a shot in the arm, a vaccine is a human-made...

Describes the planning and construction of the Colosseum in ancient Rome and traces its history through subsequent centuries.

Discusses the childhood, family life, political career, two terms as President, and accomplishments of Thomas Jefferson.

Discusses early theories on gravity, principles of how gravity works, and possible effects of gravity with regards to such phenomena as white dwarfs and black holes.

Discusses the discovery of atoms and how they work, nuclear energy and weapons, nuclear radiation and its medical uses, atomic clocks, and other applications.

Discusses the history of lasers and their uses in such fields as medicine, entertainment, and the military.