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BERKELEY — Pyrethroids, among the most widely-used home pesticides, are winding up in California rivers at levels toxic to some stream-dwellers, possibly endangering the food supply of fish and other aquatic animals, according to a new study by researchers at the University of California, Berkeley, and Southern Illinois University (SIU).

Researchers from the University of Sheffield have created a new online atlas which displays images of the world, but not as we know it. The atlas includes over 200 maps which have been redrawn to show, at a glance, which cities are the largest, how all urban areas compare, and whether many or few people live in the countryside.