Problem: Since then, the world has seen many enactments, adjustments, and repeals. For specific details, an overview is available at Daylight saving time by country.
Has the world seen many or few changes in the observation of DST?
The answer is the following: many

Problem: During the war, the Paris National Guard, particularly in the working-class neighbourhoods of Paris, had become highly politicised and units elected officers; many refused to wear uniforms or obey commands from the national government. National guard units tried to seize power in Paris on 31 October 1870 and 22 January 1871. On 18 March 1871, when the regular army tried to remove cannons from an artillery park on Montmartre, National Guard units resisted and killed two army generals. The national government and regular army forces retreated to Versailles and a revolutionary government was proclaimed in Paris. A Commune was elected, which was dominated by socialists, anarchists and revolutionaries. The red flag replaced the French tricolour and a civil war began between the Commune and the regular army, which attacked and recaptured Paris from 21–28 May in La Semaine Sanglante (Bloody week).
On which dates did La Semaine Sanglante occur in Paris?
The answer is the following: 21–28 May

Problem: In Latin, papyri from Herculaneum dating before 79 AD (when it was destroyed) have been found that have been written in old Roman cursive, where the early forms of minuscule letters "d", "h" and "r", for example, can already be recognised. According to papyrologist Knut Kleve, "The theory, then, that the lower-case letters have been developed from the fifth century uncials and the ninth century Carolingian minuscules seems to be wrong." Both majuscule and minuscule letters existed, but the difference between the two variants was initially stylistic rather than orthographic and the writing system was still basically unicameral: a given handwritten document could use either one style or the other but these were not mixed. European languages, except for Ancient Greek and Latin, did not make the case distinction before about 1300.[citation needed]
Papyri from Herculaneum dating before 79 AD have been to to be written in which hand writing?
The answer is the following: old Roman cursive

Problem: The discovery and isolation of radium in uranium ore (pitchblende) by Marie Curie sparked the development of uranium mining to extract the radium, which was used to make glow-in-the-dark paints for clock and aircraft dials. This left a prodigious quantity of uranium as a waste product, since it takes three tonnes of uranium to extract one gram of radium. This waste product was diverted to the glazing industry, making uranium glazes very inexpensive and abundant. Besides the pottery glazes, uranium tile glazes accounted for the bulk of the use, including common bathroom and kitchen tiles which can be produced in green, yellow, mauve, black, blue, red and other colors.
In what types of paints was radium first used?
The answer is the following:
glow-in-the-dark