Reconvergence is a 2012 documentary film directed by Edward Tyndall featuring the lives and views of four characters: naturalist Eustace Conway, scientist Preston Estep, historian Waite Rawls, and poet Caleb Whitaker.
 The film features a wide exploration of their views on history, memory, consciousness, and the changes wrought by technologies.
 The film screened at various American film festivals and was distributed by Mobius Films.
A sensitive flame is a gas flame which under suitable adjustment of pressure resonates readily with sounds or air vibrations in the vicinity.
 Noticed by both the American scientist John LeConte and the English physicist William Fletcher Barrett, they recorded the effect that a shrill note had upon a gas flame issuing from a tapering jet.
 The phenomenon caught the attention of the Irish physicist John Tyndall who gave a lecture on the process to the Royal Institution in January 1867.
Air Defense Weapons Center (ADWS) is an inactive unit of the United States Air Force, last stationed at Tyndall Air Force Base, Florida.
 It was last assigned to First Air Force, Tactical Air Command, and was inactivated on 12 September 1991
Klaus Bachmann (born 1963, Bruchsal), journalist, writer, historian and political scientist, author of books and writings on German, Austrian and Polish culture, history and politics, as well as on the European Union and German-Polish as well as Polish-Ukrainian relations.
 In 1988, Bachmann settled in Poland and began to write on a regular basis for various Austrian and German newspapers and weeklies ("Die Presse", "Falter", "Die Tageszeitung"), reporting on the revolutionary and evolutionary political, economic, social and cultural changes in the post-Soviet bloc countries.
 Since 1989, he worked as the accredited foreign correspondent based in Poland, and also from 1992, in Kiev, Minsk and Vilnius.
 During the mid-90s he wrote for a Berlin daily, "Der Tagesspiegel", for "Die Stuttgarter Zeitung", "Die Hannoversche Allgemeine Zeitung", and also for Polish mainstream newspapers and weeklies ("Rzeczpospolita", "Polityka", and "Tygodnik Powszechny").
Tyndallization is a process dating from the nineteenth century for sterilizing substances, usually food, named after its inventor, scientist John Tyndall.
 It is still occasionally used.
Corinne Le Quéré FRS (born July 1966) is a Franco-Canadian scientist.
 She is Professor of Climate Change Science and Policy at the University of East Anglia and Director of Tyndall Centre for Climate Change Research.
The Tyndall Forum is an environmental science and opinion former debating group named after the scientist John Tyndall.
Mount Tyndall is a peak in the Mount Whitney region of the Sierra Nevada in the U.S. state of California.
 It rises to 14025 ft , and is the tenth highest peak in the state.
 The mountain was named in honor of the Irish scientist and mountaineer, John Tyndall.
The centre, named after the 19th-century UK scientist John Tyndall (born in Ireland) and founded in 2000, has eight core partners: the University of East Anglia, University of Cambridge, Cardiff University, University of Manchester, Newcastle University, University of Oxford, University of Southampton, and the University of Sussex.
 Fudan University joined the Tyndall Centre partnership in May 2011.
John Tyndall FRS (2 August 1820 – 4 December 1893) was a prominent 19th-century Irish physicist.
 His initial scientific fame arose in the 1850s from his study of diamagnetism.
 Later he made discoveries in the realms of infrared radiation and the physical properties of air.
 Tyndall also published more than a dozen science books which brought state-of-the-art 19th century experimental physics to a wide audience.
 From 1853 to 1887 he was professor of physics at the Royal Institution of Great Britain in London.

Question: What year did the scientist, who is the namesake of the Tyndall Center, die?
Answer: 1893