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Scientists discover the oldest Homo sapiens fossils at Jebel Irhoud, Morocco
Some of the Middle Stone Age stone tools from Jebel Irhoud (Morocco). Pointed forms such as a-i are common in the assemblage. Also characteristic are the Levellois prepared core flakes (j-k). The Max Planck Institute for Evolutionary Anthropology announced their find on June 7, 2017. Photo by Mohammed Kamal/MPI EVA Leipzig/UPI
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Max Karl Ernst Ludwig Planck (April 23, 1858 – October 4, 1947) was a German physicist who is regarded as the founder of the quantum theory, for which he received the Nobel Prize in Physics in 1918.

Planck came from a traditional, intellectual family. His paternal great-grandfather and grandfather were both theology professors in Göttingen; his father was a law professor in Kiel and Munich; and his paternal uncle was a judge.

Planck was born in Kiel, Holstein, to Johann Julius Wilhelm Planck and his second wife, Emma Patzig. He was baptised with the name of Karl Ernst Ludwig Marx Planck; of his given names, Marx (a now obsolete variant of Markus or maybe simply an error for Max, which is actually short for Maximilian) was indicated as the primary name. However, by the age of ten he signed with the name Max and used this for the rest of his life.

This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia article "Max Planck."