EnvironmentWhy I won't be buying sea-farmed salmon ever again I knew there were problems with salmon reared in captivity at sea, but after witnessing the damage inflicted by life in an ocean pen, I will be voting with my shopping trolley, says Graham Lawton Comment
PhysicsWhy Isaac Newton's laws still give physicists a lot to think about The apparent equivalence of gravitational mass to inertial mass is a remarkable and beautiful feature of the cosmos, with a deep implication, says Chanda Prescod-Weinstein Comment