Butterflies and Moths Many Animals Come From the Environment In 2007, environmentalists managed to convince the World Trade Organization to ban trade in zebra mussels, a invasive species that clogs water intakes for some 1,000 cities around the
Paleontology A new species of bird weighs as much as a man. A physicist explains A newly identified bird fossil from northern Poland weighs over 14 pounds and is about the size of a grown man. One theory is that it might have been called
