1. The Big Bang
TIMELINE · 13.8 billion years ago
The beginning of space, time, matter and energy, 13.8 billion years ago. The name misleads: it was not an explosion IN space but an expansion OF space, happening everywhere at once, with no center and no outside. What came before, or whether before even means anything, is a question physics cannot yet answer. Honest science starts with an honest opening line.
🚀 Fly there in the 3D universe