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A Cardiff parent's collection box for outgrown uniforms grew into a site where families swap school clothes within one school community; 8,000 items so far.
Ler o casoA 35m rotating boat lift rejoined Scotland's Union and Forth & Clyde canals in 2002 — balanced gondolas turn using the energy of boiling eight kettles.
Ler o casoEach winner pays for the value its ad displaces, and ads compete with organic posts in the feed.
Ler o casoA Malmö start-up redesigned the heat exchanger so kitchen grease flows past the coils — cutting restaurant heating bills by up to 90%.
Ler o casoDyslexic designer Christian Boer made letters bottom-heavy and asymmetric so they look wrong when mentally rotated — 300,000 downloads since 2011.
Ler o casoDC stores its enacted laws as XML on GitHub, which feeds its official code site automatically.
Ler o casoMicro-optics magnify hidden images, so Liberty Bells morph into '100' when the note is tilted.
Ler o casoThe utility's cheap financing flipped solar from a cost to a roof-rent credit and got 2,000 applicants in three days.
Ler o casoAfter a mercury-elevator joke was taken seriously, Scott Fahlman proposed :-) and :-( as tone markers.
Ler o casoA one-way weekly bus keeps a rail route open without paying for the train or the lengthy closure process.
Ler o casoIn 1923 a Delaware homemaker kept a misdelivered 500 chicks and sold them for meat — the accidental start of America's broiler chicken industry.
Ler o casoLock-file task claiming and a GCC reference split the Linux-kernel bugs among 16 agents (about $20,000).
Ler o casoBoeing locked volunteers in a simulated 20-hour flight at different altitudes to pick the 787 and 777X cabin pressure.
Ler o casoA California dairy runs manure water through wood chips and river rock where worms and microbes work; ammonia fell in a UC Davis study, methane data disagree.
Ler o casoPooling attendance, grades and home context on each ninth-grader beat $7 billion of school turnarounds.
Ler o casoChopping needles made them dense enough to gasify, so a fire hazard became village power and wages.
Ler o casoBy swapping the concessionaire's upfront check and revenue share for a management fee, the Falcons set 'street prices'. Sales beat their forecast twice over.
Ler o casoA host-specific parasitic wasp was mass-reared and dropped from planes, replacing pesticides.
Ler o casoNet-catching fairings worked under 50% of the time in Atlantic swells; the fix was deleting the catch — composites float, so a crane boat now recovers 99%.
Ler o casoA 1990 protest by A-ha's singer won EVs a purchase-tax exemption; stacked exemptions drove EVs to three in four new cars sold by 2020.
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