Humans used stone tools and painted cave art (like in Lascaux, France).
Prehistoric Times
The Great Pyramid of Giza was built around 2560 BCE and was the tallest man-made structure for over 3,800 years!
Ancient Egypt / Ancient civilizations
People believed diseases were caused by "bad air" (miasma theory) and used leeches for medicine.
Middle Ages
Leonardo da Vinci wrote his notes backwards (mirror writing)!
Renaissance
Children as young as 5 or 6 worked in dangerous factories for 12+ hours a day.
Industrial revolution
The word "smog" was invented in London (smoke + fog).
Industrial revolution
It began in Great Britain (late 1700s) before spreading to Europe and the U.S.
Industrial revolution
The Tyrannosaurus rex had teeth the size of bananas (up to 12 inches long!) but couldn’t chew—it swallowed meat in chunks.
Prehistoric world
Early humans hunted woolly mammoths for food and used their bones to build huts!
Prehistoric times
Great Wall Fact: The earliest walls were built with sticky rice mortar (mixed with lime)!
Ancient Civilizations
The printing press (1440) made books cheaper and faster to produce—helping spread ideas (and the Renaissance itself!).
Renaissance
Sleep Fact: Medieval Europeans had "first sleep" (after sunset), woke for 1–2 hours (to pray, chat, or visit neighbors), then had "second sleep."
Middle Ages
Meat was expensive, so peasants ate bread, cheese, and veggies—making them healthier than nobles who overate meat!
Middle Ages
Library Rule: Books were so valuable that universities chained them to prevent theft!
Middle Ages
By 2030... Flying Taxis? Companies like Uber are already testing air taxis in cities like Dubai and Los Angeles!
Future
NASA’s Plan: The first crewed mission to Mars could happen by the late 2030s—and some people want to live there permanently!
Future
