Early mammal varieties declined as flowering plants radiated

The dramatic explosion of flowering plant species that occurred about 100 million years ago was thought to have been good news for evolving mammals, providing them with new options for food and habitat. But research by geologists ...

Soil samples reveal urban mercury footprints

Indianapolis, St. Louis, Detroit, Buffalo, Richmond and Providence – cities scattered across the eastern half of the United States – have something in common, all have coal-fired power plants. A new study from the ...

STAR TRAK for August 2012

The annual Perseid meteor shower, which will peak on Aug. 11-12, is one of the most popular every year because it happens on warm summer nights, when gazing at the starry sky is always enjoyable. In a clear, dark sky there ...

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