Gamma-ray bursts - The Birth Cries of a Black Hole

40 years ago enormous outbursts of gamma-rays were observed in the sky. We now know that these so called gamma-ray bursts originate from the birth cries when black holes are formed. This occurred particularly in the early life of the universe and can thus be used to study the universe and its evolution. In this lecture I will tell you the fascinating story about how gamma-ray bursts where discovered and how we solved the puzzle to better understand them. I will focus especially on how this was made possible using satellite observations.