Li-Fi Gets Ready to Compete with Wi-Fi 12 years ago
It's interesting how things go back and forth in science...
A Brazilian priest studied about using light to transmit data and achieved that around 1 century ago, even before Marconi
Unfortunately his government didn't supported him, because he "was a mad priest" that wanted to send messages to other worlds, he said:
"Give me a vibratory movement as large as the distance that separates us from these other worlds that roll our heads, or below our feet, and I will make the sound of my voice reach there."