The international KArlsruhe TRItium Neutrino Experiment (KATRIN) at the Karlsruhe Institute of Technology (KIT) has once again surpassed its own achievements. The latest data establish an upper limit of 0.45 eV/c² (equivalent to 8 x 10^-37 kilograms) for the neutrino mass. With this result, KATRIN, which measures neutrino mass in the laboratory using a model-independent method, has once again set a world record. The researchers have published their results in the journal Science (DOI: 10.1126/science.adq9592).

In a striking demonstration of molecular control, a team of Japanese scientists has harnessed light to reverse the twist in self-assembling molecules. The study led by Professor Shiki Yagai from Chiba University identifies how trace residual aggregates in photo-responsive azobenzene solutions can reverse helical chirality through secondary nucleation. By using precise control of ultraviolet and visible light, the researchers could switch between the rotation of helices, offering a breakthrough for novel materials with tunable properties.