Since the mid-1990s, scientists have been trying to figure out what has been causing frogs around the United States and Canada to become deformed. Little progress has been made in sorting out which ...

Parasites give new meaning to the cliché “eat or be eaten.” Often their life cycle can be completed only if they are ingested by a host—multiple times for some—making the odds of their survival ...

For decades, scientists have observed a clear pattern across the natural world: biodiversity tends to be higher near the equator and lower toward the poles. Known as the latitudinal diversity gradient ...