Astrology
Astrology is the belief that the positions of the Sun, Moon, planets, and stars influence human affairs and personalities, and that they can be used…
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Alchemy
Alchemy was an ancient and medieval practice that sought to transform base metals such as lead into gold, to discover a universal cure for disease,…
What Killed the Dinosaurs
Around sixty six million years ago, the dinosaurs and many other forms of life suddenly vanished in one of the great mass extinctions in Earth's…
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…
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…
Flat Earth
The idea that the Earth is flat is a debunked belief that the planet is a disc or a plane rather than a sphere. It has been contradicted by…
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…
Miasma Theory
Miasma theory was the belief that diseases such as cholera and the plague were caused by "bad air," a poisonous vapor thought to rise from rotting…
Andrew Carnegie
Andrew Carnegie was a Scottish American industrialist who led the enormous expansion of the American steel industry in the late nineteenth century…
Humorism: The Four Humors
Humorism, or humoral theory, was the belief that human health depends on the balance of four bodily fluids, called humors: blood, phlegm, yellow…
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…
Petra
Petra is an ancient city in southern Jordan, famous for its monumental buildings carved directly into rose-coloured sandstone cliffs. Once the…
John D. Rockefeller
John D. Rockefeller was an American business magnate who became the dominant figure in the early oil industry and, by most accounts, the wealthiest…
Katherine Johnson
Katherine Johnson was an American mathematician whose precise calculations of orbital mechanics were critical to the success of the United States'…