Rebar (reinforced steel in concrete) was invented in the 1850s — transforming the strength of concrete construction.
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The transistor revolutionized modern electronics.
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The first computer virus was created in 1983 as an experiment — it spread via floppy disks and was called 'Elk Cloner.'
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In 1999, several countries experienced a computer scare known as the Y2K problem.
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The battery stores and releases electrical energy.
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The QWERTY keyboard layout was designed partly to slow typists down and prevent typewriter jams.
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The Tokyo Skytree is one of the tallest towers globally.
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The first programmable digital computer was Z3, built by German engineer Konrad Zuse in 1941.
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Hydraulic systems use incompressible fluid to transfer force — they power everything from car brakes to excavators.
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