PhysicsHow to think about... ParticlesIt makes sense that stuff should be made of stuff. But peer closely at the basic building blocks of matter, and there’s surprisingly little to themFeatures
PhysicsWe've measured the pressure inside a proton and it's extreme The pressure inside a proton is a billion billion billion times the pressure in the Mariana Trench, and 10 times higher than in the core of a neutron star News