All fired up for tool making.Discolored dis·col·or v. dis·col·ored, dis·col·or·ing, dis·col·ors v.tr. To alter or spoil the color of; stain. v.intr. To become altered or spoiled in color. patches on a cave floor in southwestern France provide evidence that Neanderthals who made stone tools at the site between 53,900 and 65,600 years ago intentionally set fires. Only a few firmly dated examples of fire use exist for that time period, assert Jean-Philippe Rigaud of Bordeaux University in Talence, France, and his coworkers in the December 1995 Antiquity. Measurements of accumulated radiation in burned soil samples from the French cave provided age estimates and indicated that the sediment had been heated at temperatures characteristic of controlled fires. Lichen lichen (lī`kən), usually slow-growing organism of simple structure, composed of fungi (see Fungi) and photosynthetic green algae or cyanobacteria living together in a symbiotic relationship and resulting in a structure that resembles neither remnants in the charred soil suggest that lichens Lichens Symbiotic associations of fungi (mycobionts) and photosynthetic partners (photobionts). These associations always result in a distinct morphological body termed a thallus that may adhere tightly to the substrate or be leafy, stalked, or hanging. may have been plucked from the cave's walls to feed ancient fires, according to according to prep. 1. As stated or indicated by; on the authority of: according to historians. 2. In keeping with: according to instructions. 3. Rigaud's group. Rigaud suggests that the cave dwellers may have used fires to light the chamber as they fashioned stone implements typical of the era, which were also found in the cave. |
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