Mach's principle is a hypothesis first stated by Ernst Mach in 1893, which states that:
"The inertia of any system is the result of the interaction of that system and the rest of the universe. In other words, every particle in the universe ultimately has an effect on every other particle."
... in film
1904 in literature
1904 in music
1904 in sports
Events:
January 7 - The distress signal[?] "CQD" is established only to be replaced two years later ...