◆ On this day

January 21

3 sourced moments from January 21 in history: Louis XVI was condemned by one vote — on one of four counts (1793); The first nuclear-powered submarine, USS Nautilus, is launched (1954); and The supersonic Concorde enters commercial service (1976).

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3 things happened on January 21

newest first ↓

1976 Technology · Transportation

The supersonic Concorde enters commercial service

Two needle-nosed jets lifted off from London and Paris at the same moment, carrying paying passengers faster than sound.

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1954 Technology · Engineering

The first nuclear-powered submarine, USS Nautilus, is launched

A champagne bottle, a Connecticut shipyard, and the first warship that no longer had to surface for air.

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1793 History · Modern

Louis XVI was condemned by one vote — on one of four counts

The Convention voted four times before guillotining Louis XVI on 21 January 1793; only the death sentence itself turned on a single vote.

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