The US House of Representatives voted to impeach President Donald Trump for abuse of power (230 votes to 197) and obstruction of Congress (229 votes to 198).
Australia recorded its hottest day ever with an average temperature of 105°F across the country.
Mariah Carey's single 'All I Want for Christmas Is You' reached number one, 25 years after its release.
The longest ever United Nations climate talk ended.
The deepest point of land was identified.
Climate activist Greta Thunberg was named Time magazine's Person of the Year.
The World Health Organization announced that 142,000 people died of measles around the world in 2018, nearly 20,000 more than in 2017.
Speaker of the US House of Representatives, Nancy Pelosi, announced articles of impeachment against President Donald Trump would be drawn up for the abuse of power.
The 70th anniversary of NATO was marked by a gathering in London of world leaders, followed by a reception by Elizabeth II at Buckingham Palace.
Spotify announced Drake as the most-streamed star of the 2010s with 28 billion streams, and Ed Sheeran's 'Shape Of You' as the most-streamed track with 2.4 billion streams.
A wooden relic thought to be from Jesus's manger was returned to Bethlehem.
The 400th anniversary of the end of the Transatlantic Slave Trade was celebrated with the 'Year of Return' in Ghana.
The world's largest luxury goods corporation, Louis Vuitton (LVMH), bought jeweler Tiffany & Co. for $16.2 billion.
Taylor Swift won six awards at the American Music Awards, including Artist of the Year and Artist of the Decade.
Elon Musk revealed Tesla's first electric cyber truck with shatterproof windows.
Snake fossils found in Rio Negro Province, Argentina, showed snakes with hind legs that lived over 70 million years ago.
Oxford Dictionaries declared 'climate emergency' as the word of the year for 2019.
The Brazilian Space Agency announced that the country's Amazon rainforest had suffered its biggest spike in deforestation in over a decade.
A 55-year-old man became the first known person to contract COVID-19.
The city of Havana, Cuba, celebrated its 500th birthday.
The Disney+ streaming service was launched.
Iran claimed to have found over 50 billion barrels of oil in the country's Khuzestan province.
462 non-violent inmates were released from Oklahoma prisons in the largest commutation in American history.
Climate Control reported that rising sea levels would 'erase' many coastal cities by as early as 2050.
Forty-two people were buried alive in a landslide in Bafoussam, Cameroon.
Actor Wes Studi received the Governor's Award Oscar for Lifetime Acting Achievement, making him the first Native American to do so.
Major Australian newspapers blacked out their front pages in protest against press restrictions on printing whistleblower stories.
The oldest natural pearl discovered off the Abu Dhabi coast was estimated to be 8,000 years old.
The first all-female spacewalk took place.
Lana Del Rey's song 'Video Games' was named song of the decade at the Q Awards in London.
The Netflix movie 'Bird Box' and the TV series 'Stranger Things' was reported to be Netflix's most popular for 2019.
A camera in London Zoo became the first camera to take selfies powered by plants.
The state of California became the first to ban fur products.
Three thousand five hundred women in Iran were allowed to attend a soccer match for the first time in 40 years.
Protestors took to the streets in Hong Kong after the government announced a ban on face masks.
Bernie Sanders suffered a heart attack.
A super-massive iceberg broke away from Antarctica.
Elon Musk announced that he was building a spaceship called Starship that would travel to Mars and return to Earth.
The World Health Organization announced that they would give measles vaccinations to 800,000 children in the Democratic Republic of the Congo.
Actor Billy Porter who played Pray Tell in the American drama 'Pose,' made history after becoming the first openly gay actor to win an Emmy Award.
Widespread forest fires in Indonesia caused the skies to turn red.
The climate change rally led by activist Greta Thunberg saw millions of protesters worldwide standing up for urgent action.
The American Bird Conservancy released a study indicating that the bird population in North America had reduced by around 3 billion.
During the Senate climate crisis task force, climate change activity Greta Thunberg said, 'You're not trying hard enough. Sorry.'
The New York Times published an investigation declaring Guantanamo Bay Prison as the most costly prison in the world.
Personal information of Ecuador's entire population (16.6 million) became available online on an unsecured cloud server in Miami.
The UK's prime minister Boris Johnson compared himself to The Hulk in his efforts to steer the country out of the European Union.
NASA revealed that water vapor was discovered in the atmosphere of an Earth-size planet, the exoplanet K2-18b.
Margaret Atwood published 'The Testaments,' a sequel to 'The Handmaid's Tale,' which she released 15 years prior.
The Indian Space Research Organization's Vikram Moon lander crash-landed on the moon.
