Nebraskan Cliff Hillegass began this popular series of educational aids
(Here is our science guy, Bill Nye) It's the gas produced by adding vinegar, an acid, to sodium bicarbonate
A 1925 storm spelled disaster for the helium-filled Shenandoah, one of these transports
A federal law from 1950 prohibited the labeling of colored oleo as this
A 231-foot band of linen, this medieval embroidery depicts the Norman Conquest of England
The Dept. of Agriculture began a new version of this program in 1964; by 1975 it was helping over 17 million people
In 1924 Ramsay MacDonald, son of a servant girl, became Britain's first PM from this working man's party
This ancient statue is also named the Aphrodite of Melos
I've had it "on my mind" that this state has joined the Union 3 times, in 1788, 1868 & 1870
The Allies had a "fixed" income after WWI, asking 132 billion marks in these German compensation payments