$10 billion was pledged to help fight climate change by Amazon's CEO, Jeff Bezos.
The United States had its first official COVID-19 related death.
US President Donald Trump was acquitted of impeachment charges by the US Senate.
The United Kingdom left the European Union, also known as 'Brexit.'
Coronavirus was declared a Public Health Emergency of International Concern by the World Health Organization (WHO).
A helicopter carrying nine people, including Kobe Bryant and his daughter, crashed in California with no survivors.
The world's largest twin-engine airliner completed its first trip.
One hundred million people were placed in lockdown in Wuhan, China, amid the COVID-19 outbreak.
A meteorite that hit Australia 2.2 billion years ago was announced as Earth's oldest recognized meteorite impact structure.
The trial phase of former US President Donald Trump's first impeachment began.
A meteorite that landed in Australia in the 1960s revealed stardust up to 7 billion years old.
Diego, a 100-year-old tortoise, was retired from a breeding program after fathering 800+ children.
Justin Bieber posted on Instagram that he has Lyme disease, a bacterial illness spread by ticks.
