The Stratospheric Observatory for Infrared Astronomy, known as SOFIA, took to the skies to study star formation within our galaxy by making measurements that cannot be done by any other astronomical facility. Astronomers discovered signs of stellar activity within some dark cores (small dark patches often associated with very early stage formation of massive stars) that have traditionally indicated starless cores without active star formation. Some of these dark cores, it turns out, are not so cold as once thought due to heated dust by forming stars, while in others no trace of star formation was found. Astronomers continue to search for better ways to pinpoint those rare dark clouds within which massive stars begin forming and grow so rapidly so early.