American swimmer Michael Phelps became the first person to win eight gold medals at one Olympic Games.
Source
Charles Reed Bishop founded First Hawaiian Bank and opened its first branch in Honolulu.
Pope Leo II became the bishop of Rome.
Balloonist John Wise started the world's first airmail service by balloon from Lafayette to Crawfordsville, Indiana.
Asaph Hall discovered Mars' second moon, called Phobos.
Younes Abouyaaqoub drove a van into pedestrians on La Rambla in Barcelona, Spain, killing 14 people and injuring at least 130 others.
