59 BCERome posts the Acta Diurna
Julius Caesar orders the Senate's daily proceedings made public. The Acta Diurna, posted in the Forum and copied for the provinces, carries official acts, court news, births and gladiatorial results — organized public news, though its writers are anonymous state scribes rather than independent reporters.
c. 713 CETang China's court gazette
The Kaiyuan Za Bao, a hand-copied bulletin of court news circulated to officials during the Tang dynasty's Kaiyuan era, stands near the head of China's dibao gazette tradition — government news systematically distributed on paper roughly nine centuries before Europe printed its first newspaper.
1605The first printed newspaper
In Strasbourg, printer Johann Carolus, tired of hand-copying his subscription newsletter of dispatches, sets it in type as the Relation aller Fürnemmen und gedenckwürdigen Historien — recognized by the World Association of Newspapers as the world's first printed newspaper.
1735The Zenger verdict
New York printer John Peter Zenger, jailed for seditious libel after his paper attacked Governor William Cosby, is acquitted when lawyer Andrew Hamilton persuades the jury that printing the truth cannot be a crime. The verdict changes no statute but becomes a founding legend of press freedom in the American colonies.
1851Reuter wires the news
Paul Julius Reuter — who a year earlier bridged a gap in the telegraph line with carrier pigeons flown between Aachen and Brussels — opens a telegraph office beside the London Stock Exchange. His agency, alongside Havas in Paris (1835) and Wolff in Berlin, turns news into a wired, traded global commodity.
1887Nellie Bly goes inside
For Joseph Pulitzer's New York World, 23-year-old Nellie Bly feigns insanity to get committed to the Blackwell's Island asylum and spends ten days inside. Ten Days in a Mad-House triggers a grand jury investigation, budget increases follow, and undercover investigation becomes a repeatable journalistic method.
1945Burchett reaches Hiroshima
Slipping away from the official Japanese-surrender coverage, Australian correspondent Wilfred Burchett rides trains alone to Hiroshima and types the first eyewitness account of radiation sickness, published in the Daily Express on 5 September under the words 'I write this as a warning to the world' — while occupation officials deny any such illness exists.
1971The Pentagon Papers
Military analyst Daniel Ellsberg leaks a secret 7,000-page history of the Vietnam War to The New York Times. When the Nixon administration wins an injunction, the US Supreme Court rules 6–3 within weeks, in New York Times Co. v. United States, that the government cannot restrain publication — the modern high-water mark of press freedom.
1972–74Watergate
Two young Washington Post metro reporters, Bob Woodward and Carl Bernstein, follow a burglary at Democratic Party headquarters back toward the White House through two years of source-by-source verification under editor Ben Bradlee's two-source rule. President Nixon resigns in August 1974, and journalism-school enrollment surges for a decade.
2016The Panama Papers
An anonymous source leaks 11.5 million files from the Panamanian law firm Mossack Fonseca to Süddeutsche Zeitung, and the International Consortium of Investigative Journalists coordinates roughly 370 reporters in about 80 countries to mine them in secret for a year. Iceland's prime minister resigns within days of publication.