Important Inventions League
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Abacus
Ancient
A calculator often made from beads threaded on wires or rods. The beads are moved as part of the calculation. The first were used by the Babylonians in 2400BC.
MRI scans
Modern
Magnetic resonance imaging is a method of producing images of the inside of an object. Lauterbur and Mansfield share the 2003 Nobel Prize in Medicine for the invention.
