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Math minus Grammar: Number skills survive language losses
Three men who suffered left brain damage that undermined their capacity to speak and understand language still possessed a firm grip of mathematics.
- Planetary Science
Spying Saturn’s Light Show: Anomalous aurora dazzles scientists
The dancing lights that paint Saturn's sky stands out from all other auroras observed in the solar system.
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19519
Another hypothesis for the polish on the Stone Age corundum ax head is that the Stone Age people never had absolutely pure corundum, which indeed would have required diamond to polish. It is possible that these people used one grade of corundum to make the ax head and a slightly harder grade to polish it.
