In History, Today on April 22

Portuguese navigator Pedro Álvares Cabral becomes the first European to sight Brazil, claiming it for Portugal.

The Treaty of Zaragoza is signed, dividing the eastern hemisphere between Spain and Portugal along a meridian 297.5 leagues east of the Moluccas.

The U.S. Congress passes the Coinage Act of 1864, which mandates the inscription 'In God We Trust' on all coins minted as U.S. currency.

The Oklahoma Land Rush begins at noon, with an estimated 50,000 people lined up to claim land in the Oklahoma Territory.

During World War I, the Second Battle of Ypres begins. It marks the first large-scale use of chemical weapons on the Western Front by Germany.

Adolf Hitler admits defeat in his underground bunker and decides to remain in Berlin until the end of the war.

The first Earth Day is celebrated, marking the birth of the modern environmental movement.

The Holocaust Memorial Museum is dedicated in Washington, D.C., to honor the victims of the Holocaust.

Two fuel trains collided and exploded in Ryongchon, North Korea, killing at least 160 people and injuring over 1,300.

The Deepwater Horizon oil spill began in the Gulf of Mexico, becoming one of the largest environmental disasters in U.S. history.

The Paris Agreement on climate change was signed by 175 parties at the United Nations Headquarters in New York City.

Volodymyr Zelensky, a former comedian with no prior political experience, won the Ukrainian presidential election in a landslide victory.

Earth Day's 50th anniversary is marked by digital events worldwide due to the COVID-19 pandemic.

U.S. President Joe Biden hosted a virtual Leaders Summit on Climate, bringing together 40 world leaders to discuss efforts to tackle climate change.

The European Union announced a new package of sanctions against Russia in response to its invasion of Ukraine.