We will have the 12th online colloquium “Extreme Universe Colloquium” on January 24th (Tue) 17:00 (JST). The speaker is Prof. Jens Eisert (Freie Universität Berlin). For details, please refer to the poster. If you have not registered yet, please register at our online event website at least three days prior to the colloquium. (It is not necessary to register again if you have done it already.)