The Aztec Empire
The Aztec Empire was a powerful state that dominated central Mexico in the fifteenth and early sixteenth centuries, until it was conquered by Spanish…
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The Silk Road
The Silk Road was a vast network of trade routes that connected China with Central Asia, the Middle East, and Europe for many centuries. More than a…
The Violin
The violin is a wooden string instrument played with a bow, the highest pitched member of the violin family. Prized for its expressive, singing tone,…
Chess
Chess is a two player strategy game played on a board of sixty four squares with sixteen pieces per side. One of the oldest and most popular games in…
The Olympic Games
The Olympic Games are the world's foremost international sporting event, bringing together thousands of athletes from nearly every nation to compete…
The Human Eye
The human eye is the organ of sight, a remarkable structure that turns light into the images we see. Roughly the size of a ping pong ball, it…
Coffee
Coffee is a brewed drink made from the roasted seeds of the coffee plant, and one of the most popular and widely traded beverages in the world.…
Pompeii
Pompeii was a prosperous Roman city near modern Naples that was buried under volcanic ash when Mount Vesuvius erupted in 79 AD. Frozen in time by the…
The Internet
The Internet is a global system of interconnected computer networks that lets billions of devices around the world communicate and share information.…
Statue of Liberty
The Statue of Liberty is a colossal copper statue on an island in New York Harbor, one of the most famous monuments in the United States and a…
Photosynthesis
Photosynthesis is the process by which plants, algae, and some bacteria convert light energy (typically sunlight) into chemical energy stored in…
Ancient Egypt
Ancient Egypt was one of the world's earliest and longest lasting civilizations, flourishing for roughly three thousand years along the banks of the…
International Space Station
The International Space Station, or ISS, is a large spacecraft in orbit around the Earth that serves as a home and laboratory for astronauts. The…
Oprah Winfrey
Oprah Winfrey is an American talk show host, producer, actress, and philanthropist, one of the most influential figures in modern media. Born in 1954…
Andrew Carnegie
Andrew Carnegie was a Scottish American industrialist who led the enormous expansion of the American steel industry in the late nineteenth century…
Octopus
The octopus is a soft-bodied marine animal with eight arms, a bulbous head, and a level of intelligence unmatched among invertebrates. A member of…
The Northern Lights
The northern lights, known scientifically as the aurora borealis, are one of nature's most spectacular displays. Shimmering curtains of green, pink,…
Polar Bear
The polar bear is the largest land carnivore on Earth and the undisputed master of the Arctic. Superbly adapted to one of the planet's harshest…
Apollo 11
Apollo 11 was the spaceflight that first landed humans on the Moon. On July 20, 1969, the American astronauts Neil Armstrong and Buzz Aldrin walked…
Canada
Canada is a country in North America, the second-largest in the world by total area, stretching from the Atlantic Ocean in the east to the Pacific in…