Twelve North African Christians, known as the Scillitan Martyrs, were executed for their religious beliefs.
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Willis Carrier invented the world's first electronic air conditioner.
The English secret service discovered the Babington Plot to murder Queen Elizabeth I.
The Potsdam Conference began between the Soviet Union, UK & US.
Mary Leakey discovered ancient skull remains in Tanzania, Africa.
The Apollo-Soyuz Test Project completed the world's first international space rendezvous.
