Dakota

“alarm was spreading. The black figures fled from the house. One of them let fall a hobbit-cloak on the step, as he ran. In the lane the noise of hoofs broke out, and gathering to a gallop, went hammering away into the darkness. All about Crickhollow there was the sound of horns blowing, and voices crying and feet running. But the Black Riders rode like a gale to the North-gate. Let the little people blow! Sauron would deal with them later. Meanwhile they had another errand: they knew now that the house was empty and the Ring had gone. They rode down the guards at the gate and vanished from the Shire. In the early night Frodo woke from deep sleep, suddenly, as if some sound or presence had disturbed him. He saw that Strider was sitting alert in his chair: his eyes gleamed in the light of the fire, which had been tended and was burning brightly; but he made no sign or movement.”
― J.R.R. Tolkien, The Fellowship of the Ring

“Before 1800 the word “light,” apart from its use as a verb and an adjective, referred just to visible light. But early that year the English astronomer William Herschel observed some warming that could only have been caused by a form of light invisible to the human eye. Already an accomplished observer, Herschel had discovered the planet Uranus in 1781 and was now exploring the relation between sunlight, color, and heat. He began by placing a prism in the path of a sunbeam. Nothing new there. Sir Isaac Newton had done that back in the 1600s, leading him to name the familiar seven colors of the visible spectrum: red, orange, yellow, green, blue, indigo, and violet. (Yes, the colors do indeed spell Roy G. Biv.) But Herschel was inquisitive enough to wonder what the temperature of each color might be. So he placed thermometers in various regions of the rainbow and showed, as he suspected, that different colors registered different temperatures.† Well-conducted experiments require a “control”—a measurement where you expect no effect at all, and which serves as a kind of idiot-check on what you are measuring. For example, if you wonder what effect beer has on a tulip plant, then also nurture a second tulip plant, identical to the first, but give it water instead. If both plants die—if you killed them both—then you can’t blame the alcohol. That’s the value of a control sample. Herschel knew this, and laid a thermometer outside of the spectrum, adjacent to the red, expecting to read no more than room temperature throughout the experiment. But that’s not what happened. The temperature of his control thermometer rose even higher than in the red. Herschel wrote: [I] conclude, that the full red falls still short of the maximum of heat; which perhaps lies even a little beyond visible refraction. In this case, radiant heat will at least partly, if not chiefly, consist, if I may be permitted the expression, of invisible light; that is to say, of rays coming from the sun, that have such a momentum as to be unfit for vision.”
― Neil deGrasse Tyson, Astrophysics for People in a Hurry

“Staff Sergeant Jerry McCullough6 has an even more detailed account of this occasion: “The men were called together and they stood in the orchard on either side of a low earthen mound which fenced the fields. Upon the earth hedgerow stood Lt. Colonel Robert L. Wolverton. He said”
― George Koskimaki, D-Day with the Screaming Eagles

“He pointed north, beyond the chasm that was the vaesen pit, towards a mountain, its top sheer and almost level, as if a giant had taken a huge axe to the mountain and chopped its head off. Veins of red latticed the mountainside, where streams of fire leaked from its crust like pus from festering wounds. “Eldrafell, the fire mountain,”
― John Gwynne, The Shadow of the Gods