Hillary Clinton announced her candidacy for US President.
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The world's first person visited space.
Project Starshot was announced by Yuri Milner, Stephen Hawking, and Mark Zuckerberg.
The 'Twentieth Century Dinosaurs' exhibit opened at the Smithsonian Institution Museum of Natural History.
Cardinal Bellarmine condemned Galileo for stating that the earth revolved around the sun.
The Zimbabwean dollar was suspended indefinitely.
