Simplify the following text for a Grade 7 native English-speaking person.
Original: Roald Engelbregt Gravning Amundsen was a Norwegian man who explored the Arctic and the South Pole .
Simplified: Roald Engelbregt Gravning Amundsen ( ; 16 July 1872 â `` c. 18 June 1928 ) was a Norwegian explorer of polar regions .