Highlights Physics World  April 2021

Features: Methods to measure methane emissions from cows

Frontiers: ExoMars finds hydrogen chloride in Martian atmosphere

News: No gender gap found in university physics exam marks

Forum: Why COVID-19 offers us a chance to change exams forever

Transactions: James McKenzie's favourite winners of IOP business awards

Critical Point: A radiation leak in a locked-down world

What’s the right level for feature articles in Physics World?

Features: Celebrating a century of nuclear isomers

Features: Are solar cells on the brink of 50% efficiency?

Reviews: One astronomer’s bold mission to reach Mars

Reviews: John Gribbin’s latest pop-science book

Careers: Advice from particle physicist Tim Gershon

The latest physics jobs and courses

How COVID didn’t derail a school project with muon detectors