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Bruno Latour (French: [latuR]; born 22 June 1947) is a French philosopher, anthropologist and sociologist. He is especially known for his work in the field of science and technology studies (STS). After teaching at the Ecole des Mines de Paris (Centre de Sociologie de l'Innovation) from 1982 to 2006, he became Professor at Sciences Po Paris (2006-2017), where he was the scientific director of the Sciences Po Medialab. He retired from several university activities in 2017.
After his early career efforts, Latour shifted his research interests to focus on laboratory scientists. Latour rose in importance following the 1979 publication of Laboratory Life: the Social Construction of Scientific Facts with co-author Steve Woolgar. In the book, the authors undertake an ethnographic study of a neuroendocrinology research laboratory at the Salk Institute. This early work argued that naive descriptions of the scientific method, in which theories stand or fall on the outcome of a single experiment, are inconsistent with actual laboratory practice. In the laboratory, Latour and Woolgar observed that a typical experiment produces only inconclusive data that is attributed to failure of the apparatus or experimental method, and that a large part of scientific training involves learning how to make the subjective decision of what data to keep and what data to throw out. Latour and Woolgar argued that, for untrained observers, the entire process resembles not an unbiased search for truth and accuracy but a mechanism for ignoring data that contradicts scientific orthodoxy. Latour and Woolgar produced a highly heterodox and controversial picture of the sciences. Drawing on the work of Gaston Bachelard, they advance the notion that the objects of scientific study are socially constructed within the laboratory--that they cannot be attributed with an existence outside of the instruments that measure them and the minds that interpret them. They view scientific activity as a system of beliefs, oral traditions and culturally specific practices-- in short, science is reconstructed not as a procedure or as a set of principles but as a culture. Latour's 1987 book Science in Action: How to Follow Scientists and Engineers through Society is one of the key texts of the sociology of scientific knowledge in which he famously wrote his Second Principle as follows: "Scientist and engineers speak in the name of new allies that they have shaped and enrolled; representatives among other representatives, they add these unexpected resources to tip the balance of force in their favor." Some of Latour's position and findings in this era provoked vehement rebuttals. Gross and Leavitt argue that Latour's position becomes absurd when applied to non-scientific contexts: e.g., if a group of coworkers in a windowless room were debating whether or not it were raining outside and went outdoors to discover raindrops in the air and puddles on the soil, Latour's hypothesis would assert that the rain was socially constructed. Similarly, philosopher John Searle argues that Latour's "extreme social constructivist" position is seriously flawed on several points, and furthermore has inadvertently "comical results."

what other findings did he have

Some of Latour's position and findings in this era provoked vehement rebuttals.

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The Romani (also spelled Romany , ), or Roma, are a traditionally itinerant ethnic group, living mostly in Europe and the Americas and originating from the northern Indian subcontinent, from the Rajasthan, Haryana, Punjab and Sindh regions of modern-day India and Pakistan. A DNA study conducted by Indian and Estonian research facilities shows that the Roma/Romani/Gypsy and Sinti people originate from the so-called "Untouchable" Dalit community from India. The Romani are widely known among English-speaking people by the exonym Gypsies (or Gipsies), which some people consider pejorative due to its connotations of illegality and irregularity. They are a dispersed people, but their most concentrated populations are located in Europe, especially Central, Eastern and Southern Europe (including Turkey, Spain and Southern France).
The English term Gypsy (or Gipsy) originates from the Middle English gypcian, short for Egipcien. The Spanish term Gitano and French Gitan have similar etymologies. They are ultimately derived from the Greek Aiguptioi (Aigyptioi), meaning Egyptian, via Latin. This designation owes its existence to the belief, common in the Middle Ages, that the Romani, or some related group (such as the Middle Eastern Dom people), were itinerant Egyptians. According to one narrative they were exiled from Egypt as punishment for allegedly harbouring the infant Jesus. As described in Victor Hugo's novel The Hunchback of Notre Dame, the medieval French referred to the Romanies as Egyptiens. The word Gypsy in English has become so pervasive that many Romani organizations use it in their own organizational names. This exonym is sometimes written with capital letter, to show that it designates an ethnic group. However, the word is sometimes considered derogatory because of its negative and stereotypical associations. The Council of Europe consider that 'Gypsy' or equivalent terms, as well as administrative terms such as 'Gens du Voyage' (referring in fact to an ethnic group but not acknowledging ethnic identification) are not in line with European recommendations. In North America, the word Gypsy is most commonly used as a reference to Romani ethnicity, though lifestyle and fashion are at times also referenced by using this word. Another common designation of the Romani people is Cingane (alt. Tsinganoi, Zigar, Zigeuner), which likely derives from Athinganoi, the name of a Christian sect with whom the Romani (or some related group) became associated in the Middle Ages.

Who refer to them as gypsy?
They are ultimately derived from the Greek Aiguptioi (Aigyptioi), meaning Egyptian, via Latin.