Series looking at the impact of the hashtags that got millions talking.
Radio 4,路5 episodes
The hashstag that galvanised a protest movement on a scale not seen since the 1960s.
How a dress from Birmingham became the year's biggest talking point.
How one picture changed the nature of the debate about migrants in Europe.
How a fringe newspaper became a worldwide symbol for freedom of expression.
Comments made by the Nobel scientist Sir Tim Hunt started a worldwide debate on sexism.
