Want this question answered?
1907, 1943, 1967, 1988, 1992
Science and theory in the early 20th century?.
Infectious disease was the leading cause of death prior to the 20th century !:]
Albert Einstein
the most important invention was the plow
The Steamboat
The locomotive
Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century. The cotton gin (APEX)
The Steamboat
The Steamboat
The Steamboat
Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century. The cotton gin (APEX)
The cotton gin
The locomotive
the cotton gin
The cotton gin
the locomotive