Background
He was born in Drammen as the son of Hagbarth Kiær (1829–1903).
He was born in Drammen as the son of Hagbarth Kiær (1829–1903).
University of Oslo.
In 1909 he was appointed professor of paleontology at the University of Oslo, as the first in Norway to hold such a position. He was also head of the Palaeontological Museum of Oslo. His most important publication was Das Obersilur im Kristianiagebiete.
He took part in work on Spitsbergen.
He work covered corals, trilobites, and especially Devonian and Silurian fishes. He was an important inspiration for the work of Anatol Heintz.
He was a first cousin of Elias C. Kiær and Frits Kiær.