Born in Copenhagen, Bohr (1885-1962) developed the modern idea of an atom, which has a nucleus at the centre with electrons revolving round it.
When electrons move from one energy level to another, they emit discrete quanta of energy. The work won Bohr a Nobel prize in 1922.
For his achievements, Carlsberg brewery gave Bohr a special gift: a house with a pipeline connected to its brewery next door, thus providing him with free beer for life.
In 1954, Bohr helped establish Cern, the European particle physics facility.
In 1975, his son, Aage, won a Nobel for research on atomic nuclei.
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