light particles

Think about whether you can distinguish 1 million colors, recognize a single photon, look as far as the nearby galaxy. That was great enough!

The vision of the human eye can extend as far as the horizon. If the Earth is flat (not the present sphere), you can even feel the light hundreds of miles away and at night, you

If the British physicist David Deutsch makes sense, the meeting between any two people will take place infinitely in the multitude of parallel universes at the same time.