Researchers have linked the polluted run-off from cities to hormonal problems in chicks.
The long, harsh winter was even harder on animals than it was on us.
A new photo project dreams up a Paris Metro commute for lions, giraffes, and the whole gang.
An uber-rodent recently found in a Swedish kitchen is not the first humongous rat to horrify the world.
Hawaii's state bird hadn't been seen on the island since the 1700s.
Debunking the total-world-domination myth of the common rat.
This has actually been proven by science.
The ascendancy of stats-based policing has made keeping mounted units harder.
And it's probably not in the way you think.
A common packing strap is responsible for more than half of Alaska's Stellar sea-lion entanglements.
One of our more attractive invasive species is finally coming under fire.
Torrential downpours and abnormal heat could kill nearly half of penguin chicks in a single year, say researchers.
Pending a whole lot of permits, one could open in San Francisco this summer.
The U.S. mountain lion population is on the rise for the first time in a century. And more are finding their way into populated areas.
Meet the "Crittercam."
The fluffy-white hunters are everywhere this year, from New York to Baltimore all the way down to Florida.
At last, historians have charted the great "squirrel experiments" of the 1800s, which saved the humble creature from urban extinction.
These maps show how shipping vessels are creating loud neighborhoods for oceans and the animals that live there.