Pope Leo II became the bishop of Rome.
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Solymon Merrick patented the wrench tool.
Asaph Hall discovered Mars' second moon, called Phobos.
Three Americans made the first successful Atlantic Ocean crossing by hot air balloon.
Younes Abouyaaqoub drove a van into pedestrians on La Rambla in Barcelona, Spain, killing 14 people and injuring at least 130 others.
King Charles IX of France became an adult on his 13th birthday.
