This printable crossword puzzle on the topic of US History (General) has 14 clues. Answers range from 5 to 18 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
In 1892, what did Lvanousky discover?
In 1892, what engine was invented?
In 1893, what open surgery was performed?
In 1895, what did Rontgen discover?
In 1896, what did Cavendish discover?
In 1899, what telephone was invented?
In 1900, what theory was proposed?
In 1901, the first signal was sent and received across what ocean?
In 1902, the ionosphere was discovered by who?
In 1902, hormones were discovered by who?
In 1927, who theorises that the universe has been expanding from a "primal atom?"
In 1928, what medicine was discovered?
In 1930, what planet was discovered?
In 1969, who was the first person to walk on the moon?