The lifting of the ban on assault weapons has left more than a few potential gun buyers and even gun sellers uncertain about the practical effect. NPR's Peter Overby reports.
A new study reveals how a group of killer whales is able to hunt whale sharks, adding to a growing body of research showing how the whales use intelligence and coordination in impressive ways.
With efforts to bolster the federal Voting Rights Act unlikely under Republican control of the new Congress, advocates are refocusing on state protections against racial discrimination in elections.
Many animals get their external marking--like, feathers, hair or scales-from genetics. But it turns out, the crocodile gets its head patterns differently.