Karmela Padavic-Callaghan

Researchers spotted an unusual gamma-ray signal in three galaxy clusters, which may be a telltale sign of dark matter – or some even more exotic phenomenon

Irrational numbers have underpinned quantum mechanics for a century. Removing them could eliminate its strangest features and trigger the biggest upheaval in physics since quantum theory began

Craig Gidney is largely unknown outside of quantum computing, but his pioneering work on quantum circuits could have huge consequences for us all, ushering in both useful quantum computers, and the end of digital privacy and security as we know it

Astrophysicist and folklorist Moiya McTier’s Mothers of Invention gives the nine Greek muses new voices – and lets them loose on creativity. Karmela Padavic-Callaghan enjoys a fun, if acerbic, new history

Decades after it has been posited as a foundational principle of quantum physics, Richard Feynman’s “path integral” has been directly measured in an experiment for the first time.

A challenging mathematical effort undertaken by a team of undergraduates has put bounds on a promising set of ways to break and upgrade the standard model of particle physics

What even is time? Columnist Karmela Padavic-Callaghan takes on this mind-bending question by exploring the proof we have that time dilation is both a physical phenomenon and a psychological one

A year ago, researchers made a splash with a wildly creative idea for building a laser from notoriously elusive particles, but a new analysis shows this is probably impossible

The Edge of Space-Time, the September read for the New Scientist Book Club, is a dreamer’s book, full of curiosity, love, fun, art – and gloriously hard theoretical physics, says Karmela Padavic-Callaghan

Since OpenAI announced its solution to one of the prestigious Millennium Prize Problems, mathematicians have been urgently trying to unpick what it means