On this day

30 April in history.

5 moments from 1897 to 1994: discovery, creativity and courage, each with a source to read more.

5 moments

Irish stepdance

1994

Wikipedia: Riverdance

Photo: John Benson / Wikimedia Commons (CC BY 2.0)

More from 30 April

  1. English physicist J J Thomson

    1897

    The electron is discovered

    J. J. Thomson announced that cathode rays are made of tiny particles much smaller than atoms. We now call them electrons.

    Photo: Not Mentioned / Wikimedia Commons (Public domain)

  2. Grauman's Chinese Theatre , photographed by Carol M. Highsmith

    1927

    Hands in wet cement

    Film stars Mary Pickford and Douglas Fairbanks pressed their hands into the cement outside Grauman's Chinese Theatre in Hollywood.

    Photo: Carol M. Highsmith / Wikimedia Commons (Public domain)

  3. Bristol

    1963

    The Bristol Bus Boycott

    People in Bristol stopped using buses to protest a company's refusal to hire Black and Asian crews. The ban was lifted that August.

    Photo: Chris Lathom-Sharp / Wikimedia Commons (CC BY-SA 4.0)

  4. The logo of CERN – international organization which operates the world's largest particle physics laboratory

    1993

    The web is given away

    CERN put the World Wide Web software in the public domain, so anyone could use and build on it for free.

    Photo: European Organization for Nuclear Research Organisation européenne pour la recherche nu… / Wikimedia Commons (Public domain)

Moments chosen for discovery, creativity and courage. Each one links to a source where you can read more; photos are credited to their owners.