Magnetic field detectors from the first commercial magnetocephalography scanner (MEG).
1990s
1990s
1989
2000-100 BCE
1990
1988
1989
1989
1990s
1990-96
1989
1990
1989
1988
1988
1988
1990
1988
1988
4000-2001 BCE
1839 (original); circa 1988 (replica)
1990
1990s
1988
1988
1988
1988
1988
1990
1988
circa 1989
circa 1990
circa 1990
circa 1990
1989
1990s
30 CE
30 CE
2686-2613 BCE
1990
1989
1990
1988
circa 1990s
circa 1989
1989
1989
1988
1990
1988
1989