20 datos curiosos sobre la Declaración de Independencia (20 Fun Facts About the Declaration of Independence)

Los Artículos de la Confederación (Articles of Confederation)

Eli Whitney y la Revolución Industrial (Eli Whitney and the Industrial Revolution)

Viaje a través de la Vía Láctea (A Trip Through the Milky Way)

Viaje dentro de un arrecife de coral (A Trip Through a Coral Reef)

Amerigo Vespucci: Explorer of South America and the West Indies

Articles of Confederation

Juan Ponce de León: First Explorer of Florida and First Governor of Puerto Rico

Grace Hopper: Computer Scientist and Navy Admiral

Camaros

Chance the Rapper: Hip-Hop Artist

21st-Century Cars

When Elephants Cry

Rummaging for Rubies

When Cats Get Angry

Are Ghosts Real?

Snow Leopards After Dark

Coyotes After Dark

Veronica Roth

20 Fun Facts About Penguins