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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.
Fall lesenA 35m rotating boat lift rejoined Scotland's Union and Forth & Clyde canals in 2002 — balanced gondolas turn using the energy of boiling eight kettles.
Fall lesenEach winner pays for the value its ad displaces, and ads compete with organic posts in the feed.
Fall lesenA Malmö start-up redesigned the heat exchanger so kitchen grease flows past the coils — cutting restaurant heating bills by up to 90%.
Fall lesenDyslexic designer Christian Boer made letters bottom-heavy and asymmetric so they look wrong when mentally rotated — 300,000 downloads since 2011.
Fall lesenDC stores its enacted laws as XML on GitHub, which feeds its official code site automatically.
Fall lesenMicro-optics magnify hidden images, so Liberty Bells morph into '100' when the note is tilted.
Fall lesenThe utility's cheap financing flipped solar from a cost to a roof-rent credit and got 2,000 applicants in three days.
Fall lesenAfter a mercury-elevator joke was taken seriously, Scott Fahlman proposed :-) and :-( as tone markers.
Fall lesenA one-way weekly bus keeps a rail route open without paying for the train or the lengthy closure process.
Fall lesenIn 1923 a Delaware homemaker kept a misdelivered 500 chicks and sold them for meat — the accidental start of America's broiler chicken industry.
Fall lesenLock-file task claiming and a GCC reference split the Linux-kernel bugs among 16 agents (about $20,000).
Fall lesenBoeing locked volunteers in a simulated 20-hour flight at different altitudes to pick the 787 and 777X cabin pressure.
Fall lesenA 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.
Fall lesenPooling attendance, grades and home context on each ninth-grader beat $7 billion of school turnarounds.
Fall lesenChopping needles made them dense enough to gasify, so a fire hazard became village power and wages.
Fall lesenBy swapping the concessionaire's upfront check and revenue share for a management fee, the Falcons set 'street prices'. Sales beat their forecast twice over.
Fall lesenA host-specific parasitic wasp was mass-reared and dropped from planes, replacing pesticides.
Fall lesenNet-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%.
Fall lesenA 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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