On Oct. 13, 1773, a French astronomer named Charles Messier discovered the "Whirlpool Galaxy," also known as Messier 51, or M51. Here's why it mattered. On Oct. 12, 1964, the Soviet Union launched ...

Ars Technica has been separating the signal from the noise for over 25 years. With our unique combination of technical savvy and wide-ranging interest in the technological arts and sciences, Ars is ...

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