A U.S. federal judge has ordered the Interior Department to decide within 16 days whether polar bears should be listed as a threatened species because of global warming.
Authorities are receiving several reports of pigeons found alive with metal darts through their skulls. An animal rights group is offering a reward for information about the assailant.
A limited range and specialist diet mean that the Arctic porpoise may be slightly more sensitive to habitat changes linked to global warming, a new report says.
The biggest squid ever caught has begun defrosting in a huge tank. Already it's yielding clues to the species' behavior and giant size, scientists say.
Later this year, cockfighting will be banned in Louisiana, making it illegal in all 50 U.S. states. But in the U.S. territory of Puerto Rico, it is a legal, thriving industry with more than a hundred licensed arenas.
Pierre the African penguin's condition has greatly improved since scientists commissioned protective gear after he began losing his insulating, waterproof feathers.
An 87-million-year-old insect from Japan could be a "missing link" between mantises from the Cretaceous period and the modern-day bugs, researchers say.
