Nightmares are familiar to humans, but it now seems rats can have them too. Gabrielle Girardeau and colleagues at New York University put rats in a maze and blasted them in the face with an […]

• Radioactivity and Radiation: What They Are, What They Do, and How to Harness Them • ITER Physics • Books received

• Dmitry Bardin 1945–2017 • Wiesław Czyż 1927–2017 • Alper Garren 1925–2017 • Maryam Mirzakhani 1977–2017

• CERN Council elects European-strategy secretary • Nobel recognition for discovery of gravitational waves • IEEE applied-superconductivity award • DOE names top 40 breakthroughs • First users at European XFEL • Sibling celebrations at the LHC • The Higgs boson in our lives • CERN School of Computing marks 40th edition • Strong discussions in Montpellier • Baikal school stays vibrant • Visits

CERN data centre The high-luminosity Large Hadron Collider (HL-LHC) will dramatically increase the rate of particle collisions compared with today’s machine, boosting the potential for discoveries. In addition to extensive work on CERN’s accelerator complex and the LHC […]

Steven Weinberg talks to CERN Courier about his seminal 1967 work and discusses where next for particle physics following the discovery of the Higgs boson.

Half a century ago, Weinberg published a paper that unified the electromagnetic and weak interactions and revolutionised our understanding of the fundamental forces.

Sometimes referred to as the bible of particle physics, during the last 60 years the Review of Particle Physics has become the number-one reference in the field, detailing more than 38,000 measurements.

Large solar flare This image of the Sun shows a large solar flare (on the right side of the picture) coming from a giant active region called AR2673 just as the region is about to disappear behind the […]

On 15 September, having expended the last of its rocket propellant, NASA’s Cassini probe was deliberately crashed into Saturn following an epic two-decade-long journey of exploration. The mission has revolutionised our understanding of the complex […]

Vortices are an interesting feature of fluid motion. William Irvine of the University of Chicago and colleagues have now shown that the helicity of vortices, which is a measure of the degree to which vortex […]

Leaf-size variation The sizes of leaves vary by more than five orders of magnitude among plant species worldwide, yet the reason why has remained mysterious. Ian Wright of Macquarie University in Australia and colleagues have now characterised […]

Ice is commonly thought to have a hexagonal crystal structure, as reflected in the symmetry of snowflakes. Along with cubic ice, which is found in the upper atmosphere, these are the only crystalline forms of […]

Tattoo hazards The inks in tattoos are supposed to remain confined to the skin, but a recent study by Andreas Luch of the German Federal Institute for Risk Assessment in Berlin and colleagues shows that elements within […]

Servers ready to go On 12 September, 56 servers left CERN bound for the SESAME light-source facility in Jordan. “These servers are a very valuable addition to the SESAME data centre,” said Salman Matalgah, head of IT at SESAME. […]

The CSNS facility In late August, the China Spallation Neutron Source (CSNS) produced its first neutron beam, representing an important milestone for the $280 million project. The world’s fourth pulsed spallation neutron source, following ISIS in the UK, […]