PhysicsStephen Hawking's final theorem turns time and causality inside out In his final years, Stephen Hawking tackled the question of why the universe appears fine-tuned for life. His collaborator Thomas Hertog explains the radical solution they came up with Features
SocietyShould you have children? The true costs and benefits of parenthood Whether or not you have children can have a big impact on your health and happiness, not to mention the planet – and some do regret their decisions. Here’s how the evidence can guide you Features