Humanities’ earliest question about our reality is “What are we made of?” On the smallest scale possible, what are we made of? Some say we are made of atoms, but this is far from true. Protons, neutrons and electrons aren’t made of atoms. …

Time seems to flow. It has a single direction, moving through us, pulling the future into the past. British astrophysicist Arthur Eddington cleverly described this concept as the Arrow of Time or Time’s Arrow. …

What if our universe had come with a self-destruct button to eliminate itself so cleanly that all things and matter would just stop existing and life would be impossible forever? The ultimate ecological cataclysm — Vacuum Decay. To help understand how the universe could destroy itself, we need to understand…

Can particles be connected as if they’re joined together, even if they’re millions of miles apart? Quantum mechanics is one of the most amazing intellectual achievements in human history. For the first time, scientists were able to probe a world that was, until then, quite invisible to us. …