Which nun moved into the slums of Calcutta around 1948 to help the poor and was beatified on October 19, 2003?

In the 1920s, slices of which crystalline mineral were first used to control radio frequencies? Around 1927, which American artist known for his mobiles made a portrait of Josephine Baker out of wire? Around 1930, poet Angelos Sikelianos tried to revive the ancient festivals of which Greek town, called the "navel of th… Around 1930, William Lear helped develop which device for cars, sold under the name Motorola? Around 1950, three Southeast Asian states gained some autonomy, weakening the colonial union known as French what? Around 1964, North Vietnam began turning which famous supply route into a road that trucks could use? Around 2,000 years ago, members of which large African language family began settling in Angola? About 2 million years ago, which probable human ancestor, whose name means "handy man," was using simple stone tools?