Twenty-five things we found by accident:
Alexander Fleming: Moldy petri dish left by an open window
A discarded experiment became the foundation of antibiotics
Wilhelm Röntgen: Strange glow from a covered cathode ray tube
The invisible made visible, revolutionizing medicine
Percy Spencer: A melted chocolate bar near a magnetron
Radar technology became kitchen convenience
George de Mestral: Burrs stuck to dog fur after a walk
Nature's fastener, discovered on a hike
Spencer Silver: A weak adhesive that wouldn't stay stuck
The perfect failure became perfectly useful
Constantin Fahlberg: Sweet residue on hands after lab work
An unwashed hand discovered artificial sweetness
Charles Goodyear: Rubber dropped on a hot stove
Heat accident solved rubber's temperature problem
Roy Plunkett: Failed refrigerant experiment
Non-stick surfaces from a disappointment
Harry Coover: Too-sticky substance while making gun sights
A wartime nuisance became household essential
Wilson Greatbatch: Wrong resistor in a heart rhythm device
An assembly error saved millions of lives
Robert Chesebrough: Waxy residue clogging oil rigs
Industrial annoyance became skin protection
John Pemberton: Failed headache medicine
A pharmacist's failure became a global drink
John Kellogg: Stale wheat left out too long
Forgotten grain became breakfast staple
George Crum: An angry chef's too-thin potatoes
Spite created the perfect snack
Dom Pérignon: Secondary fermentation in bottles
A wine 'flaw' became celebration itself
Albert Hofmann: Accidental skin absorption
A laboratory mistake opened perception
Leo Baekeland: Formaldehyde accident in the lab
A mess became modernity's material
Harry Brearley: A rejected gun barrel alloy
Failed weapons, succeeded kitchens
Édouard Bénédictus: Dropped flask that didn't shatter
Plastic residue made glass safe
Frank Epperson: Soda left outside on a cold night
A child's forgetfulness became summer's treat
A Canon engineer: Hot soldering iron touched pen
Accidental ink spray became printing
John Walker: Stirring stick caught fire
Chemical residue sparked fire-making
Crawford Long: Ether party observation
Recreational chemicals became surgical salvation
Henri Becquerel: Fogged photographic plates
Cloudy images revealed invisible energy
Frederick Banting: Dog pancreas experiments
Animal studies saved human diabetics
The Serendipity Engine ~ Celebrating happy accidents since 2026
"In the fields of observation, chance favors only the prepared mind."