Complex sentence: He had little education, but became the student of Louis Agassiz at the Museum of Comparative Zoology at Harvard University; later he was the curator of the Peabody Museum of Archaeology and Ethnology at Harvard University from 1874 to 1909.
Split into simpler sentences: He had little education, but became the student of Louis Agassiz at the Museum of Comparative Zoology at Harvard University. Later he became the curator of the Peabody Museum of Archaeology and Ethnology at Harvard University from 1874 to 1909.