Freshwater fish at the top of the food chain evolve more slowly

For avid fishermen and anglers, the largemouth bass is a favorite freshwater fish with an appetite for minnows. A new study finds that once they evolved to eat other fish, largemouth bass and fellow fish-feeders have remained ...

New fossil tells how piranhas got their teeth

How did piranhas -- the legendary freshwater fish with the razor bite -- get their telltale teeth? Researchers from Argentina, the United States and Venezuela have uncovered the jawbone of a striking transitional fossil that ...

Scientists unravel the mystery of white-nose syndrome

The mysterious disease that has killed more than 90 percent of wintering bats in some caves and mines from Vermont to Virginia during the last three years has raised numerous questions about the nature of the disease and ...

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