

As the second year of the massive Russo-Japanese War begins, more than 100,000 die in the largest world battles of that era,
and the war chaos leads to a revolution against the Tsar. (Shostakovich's 11th Symphony is subtitled "The Year 1905" to commemorate this.)
Canada and the U.S. expand west, with the Alberta and Saskatchewan provinces and
the founding of Las Vegas. The April earthquake in India, killing 20,000, foreshadows the 1906 earthquakes.
Year 1905 is also the
annus mirabilis of Albert Einstein, publishing papers that laid the foundations of quantum physics, introduced the special theory of relativity, explained Brownian motion and established mass-energy equivalence.