INTRODUCTION In 1938, three chemists working in a laboratory in Berlin made a discovery that would alter the course of history: they...

Only five percent of the universe is visible. What is the rest made up of? INTRODUCTION The visible universe including Earth, the sun,...

A remarkable prediction of Einstein's theory of general relativity—the theory that connects space, time, and gravity—is that rotating...

One of the biggest cosmological mysteries is why the universe is made up of way more matter than antimatter, essentially why we exist....