On this day

22 April in history.

5 moments from 1876 to 2016: discovery, creativity and courage, each with a source to read more.

5 moments

Earth Day flag by John McConnell

1970

The first Earth Day. About 20 million Americans took part in teach-ins, clean-ups and rallies to speak up for the environment. Earth Day is now marked around the world.

Wikipedia: Earth Day

Photo: John McConnell (flag designer) NASA (Earth photograph) SiBr4 (flag image) / Wikimedia Commons (Public domain)

More from 22 April

  1. Tommy Milone gives up a home run to Mike Trout on May 21, 2017

    1876

    The first National League game

    Boston beat Philadelphia in the first game of baseball's National League, which still exists today.

    Wikipedia: National League (baseball)

    Photo: D. Benjamin Miller / Wikimedia Commons (CC0)

  2. Robin Knox-Johnston in 2013

    1969

    Alone around the world without stopping

    Robin Knox-Johnston sailed back into Falmouth after 312 days, the first person to sail solo, non-stop around the world. He was the only finisher of the race.

    Wikipedia: Robin Knox-JohnstonWikipedia: Sunday Times Golden Globe Race

    Photo: GeorgeCaulfield / Wikimedia Commons (CC BY-SA 4.0)

  3. Fibre optic strands

    1977

    Phone calls by light

    Optical fibre carried live telephone calls for the first time, in California. Glass threads now carry most of the world's internet traffic.

    Wikipedia: Optical fiber

    Photo: BigRiz / Wikimedia Commons (CC BY-SA 3.0)

  4. World map of countries that signed and joined the Paris Agreement

    2016

    The Paris Agreement is signed

    Leaders of 175 countries signed the Paris climate agreement on a single day, a record for an international agreement.

    Wikipedia: Paris Agreement

    Photo: L.tak / Wikimedia Commons (CC BY-SA 4.0)

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