Energy is at the heart of modern life. From heating our homes to charging smartphones, running factories, and powering transportation, everything relies on energy. For more than a century, the world has depended mostly on … Read more
When people first think of pollution, they often imagine smog in the air or dirty water. But there’s another major form of pollution that is sometimes overlooked: land pollution. Land pollution occurs when harmful substances … Read more
Long before the arrival of Christopher Columbus and European settlers, the land we know today as the United States was home to diverse peoples and cultures. These communities, known as Native Americans or American Indians, … Read more
Capital: Sacramento Population: 39,865,590 (Source: 2012 U.S. Census)California is the most populous state in the United States and a major center for culture, technology, entertainment, and agriculture. Its diverse population, climate, and economic opportunities make … Read more
George Washington: The First President of the United States Served as President: 1789–1797Vice President: John AdamsParty: FederalistAge at Inauguration: 57 Born: February 22, 1732, Westmoreland County, VirginiaDied: December 14, 1799, Mount Vernon, VirginiaMarried: Martha Dandridge … Read more
Gravity is one of the most important forces in the universe. It is the reason we stay on the ground, why the planets orbit the Sun, and why galaxies hold together across unimaginable distances. Even … Read more