PhysicsA 'magic number' of people walking across a bridge makes it sway We thought walking in lock step made bridges sway, like London’s Millennium Bridge when it opened. But it turns out crowd size matters more than rhythm ¿ìè¶ÌÊÓÆµ
PhysicsAI physicists: The machines cracking the quantum code We are all too easily bamboozled by the quantum world's complexity – now artificial intelligence is venturing where human minds fear to go Features