Core-collapse supernovae are among the most magnificent events in observable universe. They produce many of chemical elements necessary for life to exist and their remnants -- neutron stars black holes interesting astrophysical objects own right. However, despite millennia observations almost a century study, explosion mechanism core-collapse is not yet well understood. Hyper-Kamiokande next-ge...

Two groups of rabbits were trained on a brightness discrimination task. A two-choice discrimination apparatus was used. By means of food reward one group of rabbits was trained to open the darkest gate, the other was trained to open the brightest gate. The second group learned significantly faster than the first one.