"When I was a little kid, I was really scared of the dark. But then I came to understand, dark just means the absence of photons in the visible wavelength -- 400 to 700 nanometers. Then I thought, well, it's really silly to be afraid of a lack of photons. Then I wasn't afraid of the dark anymore after that." -- Elon Musk

"When I was a little kid, I was really scared of the dark. But then I came to understand, dark just means the absence of photons in the visible wavelength -- 400 to 700 nanometers. Then I thought, well, it's really silly to be afraid of a lack of photons. Then I wasn't afraid of the dark anymore after that."

-- Elon Musk