The Ebola epidemic in Guinea was declared by The World Health Organization.
The mayor of Flint, Michigan, declared a state of emergency over contaminated water.
Star Wars: The Force Awakens, directed by J.J. Abrams, had its world premiere at the TCL Chinese Theatre in Los Angeles.
The US Defense Secretary announced that the US Military would open all combat roles to women.
The San Jose, which sank in 1708, was found near Columbia.
The UK-based computer company Raspberry Pi released their $5 (£4) computer.
English singer-songwriter Adele released her third studio album, '25.'
The fourth largest diamond was found in Karowe Mine, Botswana.
In San Diego, California, SeaWorld announced that it would phase out its orca shows following protests.
Japan recognized its first legal same-sex couple.
A plane crash in South Sudan at Juba International Airport killed 31 people.
The Hunger Games: Mockingjay – Part 2 with Jennifer Lawrence premiered in Berlin, Germany.
The Russian Metrojet Flight 9268 was destroyed by a bomb.
China increased its one-child policy to two children per family.
The World Health Organization ranked Tuberculosis as deadly as HIV in its list of the world's most deadly diseases.
The twenty-fourth James Bond movie 'Spectre,' starring Daniel Craig, premiered in London.
English singer-songwriter Adele achieved the record of the first song to get over 1 million downloads in a week with her third studio album 'Hello.'
University of California scientists found evidence that life on Earth probably began 4.1 billion years ago.
American singer Selena Gomez released her second full-length studio album 'Revival.'
California Governor Jerry Brown passed a bill to legalize assisted suicide for terminally ill persons.
NASA announced that they found running water on Mars.
The latter of two total lunar eclipses was seen from the Americas.
Los Angeles Judge approved Caitlyn Jenner to change her name from Bruce and her gender to female.
Schools shut down in Singapore due to air pollution from farming practices in Indonesia.
Nature magazine announced that more than 3 million people die yearly from air pollution.
14-year-old Ahmed Mohamed was arrested at school after bringing in a homemade clock, which was mistaken for a bomb.
The science-fiction movie 'The Martian,' starring Matt Damon, premiered in Toronto, Canada.
Archaeologists and scientists discovered a new human-like species inside caves in South Africa.
Queen Elizabeth II became Great Britain's longest-reigning monarch in history.
A record-breaking haircut saved a sheep that had not been sheared in over five years in Canberra, Australia.
Google adopted a new logo design.
Rapper Kanye West publicly announced his plans to run for president at the MTV Video Music Awards.
One billion people logged into Facebook for the first time, surpassing a major milestone.
A 108-year-old message in a bottle washed up on a beach in Amrum, Germany.
More than 30 military students were injured in a mass pillow fight leading to a ban of the event in future years.
The world's most amazing face transplant took place.
Former President Jimmy Carter had a lesion removed from his liver.
A mass grave of 30 victims of the 1665 plague was found at Liverpool Street station in London, England.
Jon Stewart hosted his last episode of 'The Daily Show.'
Pittsburgh hosted the world's largest pinball tournament.
Two passenger trains derailed in Madhya Pradesh, India.
Miss Piggy and Kermit the Frog took to Twitter to tell the public that they had broken up.
President Barack Obama announced his Clean Power Plan to take action on climate change.
NASA announced they had found 'Earth's bigger, older cousin.'
American superhero movie 'Ant-Man' by Marvel was released.
Harper Lee's second novel, 'Go Set a Watchman,' was published.
NASA's New Horizons space probe completed the first flyby of Pluto in the history of human spaceflight.
Comic-Con celebrated its 48th yearly event in San Diego.
Same-sex marriage became legal in all 50 states.
NASA's Mars Odyssey completed its 60,000th orbit around Mars.
