Many complex systems relax slowly towards equilibrium after a perturbation, without ever reaching it. Experiments with crumpled sheets now show that these relaxations involve intermittent avalanches of localized instabilities, whose slow-down leads to logarithmic aging.

The application of high-harmonic spectroscopy to liquid samples shows that the cut-off energy is a material characteristic. This approach may also give experimental access to electron mean free paths.

Observation of a faint Fermi surface inside the pseudogap of an electron-doped cuprate suggests that Cooper pairing is mediated by antiferromagnetic spin fluctuations.

Material characterization of liquids in extreme thermodynamic conditions is a challenging technical problem. Brillouin scattering metrology in an optical fibre design with a sealed liquid core now enables spatially resolved temperature and pressure measurements, using carbon disulfide as an example.

Na₃Ni₂BiO₆ with a honeycomb lattice is found to host a one-third magnetization plateau phase signifying frustrated interactions and indicates that Kitaev interactions can be realized in high-spin magnets.

The origin of nematicity in kagome superconductors has been hard to explain due to other entangled phases. Now, the role of orbital hybridization and coupling is revealed to induce electronic nematicity in the kagome superconductor RbTi₃Bi₅.

Claims of a room-temperature, ambient-pressure superconductor recently kicked up a storm on social media. As the dust settles, we take stock of what this experience can teach us.

Originally invented to improve cornering techniques in race driving, speed traps contribute to road safety. Robert Wynands introduces us to tools of traffic metrology.

First-generation students have to overcome obstacles other students don’t. Every academic can help.

Radionuclides have a myriad of applications, ranging from nuclear energy to environmental studies. Carine Michotte illustrates the importance of radionuclide metrology for nuclear medicine.