LIGO

Radium painters working in a factory

An illustration of Cantor's diagonal argument (in base 2) for the existence of uncountable sets . The sequence at the bottom cannot occur anywhere in the enumeration of sequences above.

LIGO's mirrors must hold still to one-ten-thousandth the width of a proton. That precision, costing $1.1 billion, caught the first gravitational wave in September 2015 — a collision 1.3 billion years old.

Siad Barre

Siad Barre fled Mogadishu in a tank in January 1991, leaving behind a capital he had shelled into ruins; the artillery campaign against his own city killed thousands and destroyed Somalia's central state for a generation.

Col de Portet d'Aspet

One descent on the Col de Portet d'Aspet killed Casartelli and a stone memorial marks the exact concrete block that ended him. Riders cross it every Tour, sometimes placing a hand on the monument.

Stephen A. Schwarzman

Steve Schwarzman spent $3 million on his 60th birthday party — a Rod Stewart performance, a portrait of himself unveiled mid-room — then wrote a memoir advising readers to 'never do anything small.' The portrait still hangs at Blackstone.

Mir Jafar

At the Battle of Plassey in 1757, Bengali commander Mir Jafar kept 45,000 soldiers idle while Clive's 3,000 British troops routed the Nawab. In exchange, he was installed as Nawab — and Britain began absorbing a continent.

Parmalat

Parmalat's CFO produced a Bank of America account statement confirming €4 billion — it was a photocopied forgery. The dairy company behind your supermarket milk had a $14 billion hole in its books. Europe's Enron, assembled with a scanner.

Radium Girls

Young women at the US Radium Corporation painted watch dials with their lips to point the brush; their jaws later crumbled and fell out. Company doctors falsified medical records while executives stockpiled internal warnings.

Cantor's diagonal argument

Cantor showed in 1891 that the infinity of real numbers cannot be listed — proving it by constructing one number guaranteed to be missing from any list. Infinity has a size hierarchy; most people never heard it.

Super Mario Galaxy

Mario sprints across planets the size of houses, gravity bending so he runs along their undersides, while a 70-piece orchestra plays music that swells as stars come into view. A platformer that accidentally felt like awe.