In this talk I will present some of the science highlights in which I was involved during my time at MPE. All the results which I will show in this talk have been obtained using data from the Gamma-Ray Burst Monitor (GBM) onboard the Fermi spacecraft. Specifically designed for gamma-ray burst studies, GBM observes the whole unocculted sky with a total of 12 sodium iodide (NaI) scintillation detectors covering the energy range from 8 keV to 1 MeV and two bismuth germanate scintillation detectors (BGO) sensitive to energies between 150 keV and 40 MeV. GBM offers superb capabilities for the spectral analyses of GRBs and many other high- energy astrophysical sources such as e.g. solar flares. Among the science nuggets that I will present, there are an ultra-long GRB with an optical flash and the rest-frame properties of several GRBs with redshift. Additionally, γ-ray and γ-ray line emission from a soft X-ray solar flare are presented. Finally, the claimed quasi-periodic behavior of solar flares during their impulsive phase is discussed on the basis of several solar flares observed by GBM.