One billion people logged into Facebook for the first time, surpassing a major milestone.
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Pavel Durov, founder of the encrypted messaging app Telegram, was arrested in France for alleged involvement in organized crime.
Astronomers announced the discovery of an Earth-like planet named Proxima b.
Singer Steven Tyler ordered Donald Trump to stop playing their Aerosmith songs at rallies.
Mark David Chapman was sentenced to 20 years to life in prison for murdering John Lennon.
American explorer Victor Vescovo became the first person to journey to the deepest points of every ocean.
