Around 3500 B.C., people made which alloy by mixing copper with arsenic, before finding that copper and tin worked better?

Around 2500 B.C., the Harappan civilization flourished along which river in Pakistan and northwestern India? Around 2600 B.C., Pharaoh Djoser was entombed in what kind of step structure, the first large stone building of its kin… Which early modern humans, named after a rock shelter in France, succeeded the Neanderthals in Europe? Beginning in 1940, about 300,000 members of which force were called into federal service, greatly expanding the U.S. Ar… Around 4,500 years ago, the Bronze Age Minoan civilization emerged on which Mediterranean island? Around 600 B.C., according to Herodotus, Phoenician sailors claimed to have sailed around which continent? According to tradition, Saint Linus succeeded which man as pope? Around midnight on December 29–30, 1916, Prince Felix Yusupov and friends killed which mystic with poison, gunfire and…