
Foucault Pendulum for Demonstrating the Earth's Rotation
1988
1988
1839 (original); circa 1988 (replica)
1990
1989
1989
1990
1990
1990
1990
1990s
1989
2000-100 BCE
1988
1988
1990-96
1989
1988
1988
1990
circa 1990
1990
1990s
1990
1989
4000-2001 BCE
1988
1988-1990
1990
1990
1980s/ early 1990s
early 1990s
1988
2050-1750 BCE
1990-95
1989
1989
1990
1990
1988
1989
1989
1989
1990
2000-100 BCE
1988-1989
1989
circa 1990
1989
1990
1989