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735 facts in Technology. Click any fact to see its full page.
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The first computer mouse was made of wood, designed by Doug Engelbart in 1964.
Napier's bones, invented in 1617, were physical rods used for multiplication before calculators.
RSA encryption relies on the difficulty of factoring large numbers.
Morse code is still in use in aviation and amateur radio today.
Napier's bones, invented in 1617, were physical rods used for multiplication before calculators.
RSA encryption relies on the difficulty of factoring large numbers.
Morse code is still in use in aviation and amateur radio today.
The first product scanned with a barcode commercially was a pack of Wrigley's gum in 1974.
The trolley problem has influenced AI ethics — how should autonomous vehicles make life-or-death decisions?
The harmonica was invented in Germany in the early 19th century.
Marching bands in stadiums use parabolic designs to project sound directionally toward audiences.
Auto-tune was invented by a geophysicist and first appeared on Cher's 'Believe' in 1998.
The first commercial music recording was made in 1888 on a cylinder phonograph.
The saxophone, invented in 1846, was considered controversial in classical circles for decades.
Noise-canceling headphones generate sound waves that destructively interfere with incoming noise.
The electric guitar was invented in the 1930s and transformed American popular music.
The world's longest musical piece is being performed in Germany and will last 639 years.
The theremin is one of the only instruments played without being touched.
The piano has 88 keys and produces about 7.5 octaves — more range than most orchestral instruments.
Floating airports have been studied — Japan's Kansai International Airport was built on an artificial island.
The world's tallest wooden building, Brock Commons in Vancouver, has 18 stories of mass timber.
Load-bearing walls cannot be removed without structural support — this is a common home renovation mistake.
Carbon fiber composites have a strength-to-weight ratio 5x higher than steel.
Smart glass switches between transparent and opaque using an electrical charge.
Earthship homes are built from discarded tires and aluminum cans, designed to be energy self-sufficient.
Green roofs can reduce a building's energy consumption by 25% and extend roof lifespan by 40 years.
Floating architecture is growing as a response to rising sea levels.
Skyscrapers are designed to sway, not stand rigid — flexibility prevents catastrophic failure.
Geodesic domes distribute stress across all members, making them structurally efficient.
Bamboo scaffolding is still widely used in Hong Kong — it is as strong as steel for many applications.
The Golden Gate Bridge has expanded up to 3 meters in summer heat since 1937.
Self-healing concrete embedded with bacteria could dramatically extend building lifespans.
The Hoover Dam holds enough concrete to pave a two-lane highway from San Francisco to New York.
Passive house design reduces heating and cooling needs by up to 90% through insulation and orientation.
Tuned mass dampers — giant pendulums inside skyscrapers — counteract wind-induced oscillation.
The Three Gorges Dam in China is the world's largest power station by installed capacity.
The Channel Tunnel between England and France is 50 km long and took 13,000 workers six years to build.
The Sydney Opera House's iconic roof shells are sections of a single sphere of the same radius.
Tokyo Skytree uses a central pillar with a five-story dampener to resist earthquakes.
The Panama Canal saves ships a 12,000-mile journey around South America and uses no pumps — it operates entirely by gravity-fed locks.
Canned food was invented before the can opener — for 50 years, cans had to be opened with a hammer and chisel.
The first product to have a barcode scanned commercially was a pack of Wrigley's chewing gum in 1974.
The first successful powered airplane flight by the Wright Brothers lasted only 12 seconds and covered 120 feet.
Morse code encodes letters using dots and dashes — it remains in use in aviation and amateur radio.
The trolley problem has influenced AI ethics — how should autonomous vehicles be programmed to make life-or-death decisions?
Auto-tune was invented by geophysicist Andy Hildebrand and first appeared on Cher's 'Believe' in 1998.
The first commercial music recording was made in 1888 — a performance of Handel played on a cylinder phonograph.
The saxophone, invented by Adolphe Sax in 1846, was controversial in classical circles for decades.
Marching bands use parabolic reflectors in stadiums to project sound forward rather than dissipating it in all directions.
Noise-canceling headphones use destructive wave interference — they generate sound waves that cancel incoming noise.