Heike Kamerlingh Onnes was a Dutch experimental physicist who became the first to liquefy helium, cooling it to near 1.5 kelvin (K). For this work, he was awarded the Nobel Prize in Physics in 1913.
- Occupation
- physicist, inventor, university teacher, scientist
- Position held
- rector magnificus of Leiden University
- Citizenship
- Kingdom of the Netherlands
- Born
- September 21, 1853
- Died
- February 21, 1926
