Around 1620, Cornelis Drebbel demonstrated the first workable submarine on which river?

Around 1550, the English called a type of arquebus a "caliver," a corruption of which word? Around 1606, Dutch navigator Willem Janszoon made the first recorded European sighting of which continent? Around 1610, Galileo determined how fast the sun rotates by watching which dark areas shift position? In the 1610s, which Flemish Baroque master painted the famous "Descent from the Cross" for Antwerp's cathedral? In the 1620s, Italian traveler Pietro della Valle brought Europe copies of inscriptions from Persepolis in which wedge-… Around 1627, Myles Standish and which husband of Priscilla Mullins helped found the town of Duxbury, Massachusetts? Around 1630, Jan Baptist van Helmont identified which gas given off by burning wood, calling it "gas sylvestre"? Around 1668, Isaac Newton built the first practical reflecting version of which instrument?