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On This Day | July 31

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1999
Taipei 101 construction started

Taipei 101 formerly known as the Taipei World Financial Center, is a skyscraper in Taipei, Taiwan. The building was officially classified as the world's tallest from its opening in 2004 until the 2010 completion of the Burj Khalifa in Dubai, UAE. Upon completion, it became the world's first skyscraper to exceed a height of half a kilometer (about 0.3 miles). Taipei 101 is the tallest building in Taiwan.

1956
Luzhniki Stadium opened

It is the national stadium of Russia, located in its capital city, Moscow. The full name of the stadium is Grand Sports Arena of the Luzhniki Olympic Complex. Its total seating capacity of 81,000 makes it the largest football stadium in Russia and the ninth-largest stadium in Europe. The stadium is a part of the Luzhniki Olympic Complex, and is located in Khamovniki District of the Central Administrative Okrug of Moscow city. The name Luzhniki derives from the flood meadows in the bend of Moskva River where the stadium was built, translating roughly as "The Meadows". The stadium is located at Luzhniki Street, 24, Moscow.

1935
Gustav Lindenthal died

Born in Brünn, Austrian Empire (now Brno, Czech Republic), civil engineer Gustav Lindenthal is known for designing the Queensboro and Hell Gate bridges in New York City, among other bridges. Additionally, Lindenthal's idea of the bridge not having to carry the full train load allowed bridge designers to create bridges that were still stable, but at the same time much lighter and cheaper.

1913
John Milne died

John Milne was a British geologist and mining engineer who worked on a horizontal seismograph. 1880, Sir Alfred Ewing, Thomas Gray and John Milne, all British scientists working in Japan, began to study earthquakes following a very large tremor which struck the Yokohama area that year. They founded the Seismological Society of Japan (SSJ). The society funded the invention of seismographs to detect and measure the strength of earthquakes. Although all three men worked as a team on the invention and use of seismographs, John Milne is generally credited with the invention of the horizontal pendulum seismograph in 1880.

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