The conversation between human and AI assistant.
How do we know for sure that nothing is faster than light?
Slow? How so?
Well, the observable universe is estimated to be about 93 billion light years in diameter. That means it would take light 93 billion years to travel from one side of the universe to the other. In comparison, the universe is thought to be about 13.8 billion years old, so the speed of light is slow on that scale.