There may be no greater tribute to a society's ingenuity and vision than Egypt's Great Pyramid of Giza. Originally standing 481 feet (147 meters) …
Sure, the Great Pyramid is magnificent, but ancient Egyptians can take credit for a whole lot more than that. Plus, more groundbreaking inventions from around the world.
We take a lot of things for granted in the modern world. Fiber optic cables deliver enormous amounts of information at nearly the speed of light. …
The National Aeronautics and Space Administration (NASA), the U.S. government agency that runs the country's civilian space program, has accomplished …
The Industrial Revolution, an innovative period between the mid-18th and mid-19th centuries, shifted people in Europe and the U.S. from a …
Inventing a useful product or process is serious business. Turn a great idea into a marketable widget, and you could earn millions of dollars. But …
Join the HowStuffWorks Newsletter
Be the first to hear about interesting news in science, culture, tech and beyond. Buckle up, friend.
Check Out Our Brain Games!
Riddle Answer
📨 Get more puzzles and brain games by signing up for our newsletter! Puzzle provided by BestCrosswords.com Feeling sharp as a tack and ready to play …