Top left box (a): Image of the field of the GRB121024A captured by the Very Large Telescope (VLT), Chile. The GRB121024A is the point marked by the dotted lines. The glow of the GRB121024A in the image does not correspond to its distance from the Earth. In fact, as can be seen, the GRB121024A is one of the brightest objects in the field, despite being one of the most distant, if not the most distant one, in the image. So the point marked corresponds to the explosion of a star about ~11,000 million years ago when the age of the Universe was only one third of what it is now. General box (b): Artist's impression of the GRB121024A. It is possible to see the jets emerging from the dying star in the center of which a black hole would form. The blue wave spread by the jet represents the circular polarization detected. Acknowledgements: NASA, Goddard Space Flight Center/S. Wiessinger.