Compare the size of ancient corn cob with modern-day corn.
Photoelectric relay made at Yerkes Observatory, Williams Bay, Wisconsin, with the cooperation of the General Electric Co., and photoelectric cells by R. J. Cashman and W. S. Huxford, 1933. Courtesy of the Adler Planetarium.
Moldboard plow (c. 1830 -1834), made in Connecticut. Illinois Legacy Collection, Gift of the Alan R. Smith family.
WWI helmet, (1917) worn by by Kent Hagler (shown in framed image) during his service in France.