X-ray spectroscopy of Gamma-Ray Bursts

In this review we briefly summarize the recent developments in the research on Gamma-Ray Bursts (GRB), and discuss in more detail the recent results derived from X-ray spectroscopy, in particular the detection of X-ray narrow features and their implication on our understanding on the origin of GRB. Finally, we outline the importance of high-resolution spectroscopy in X-rays, which can provide new clues on the nature of progenitors, and a powerful probe of the early universe and primordial galaxy formation.