Imagine looking up at the sky on a crisp autumn evening, only to witness a swirling river of birds soaring overhead—thousands ...

"Further research is needed." Scientists make surprising discovery after studying massive creatures' behavior: 'A flexible ...

The face of U.S. President Donald Trump flashes on the flat-screen TV that Luis Olea bought with the money he earned ferrying ...

Tracking global migration has long been hampered by poor, outdated data. Now researchers have harnessed social media data to ...

The U.S. Army will take control of almost 110,000 acres of federal land along the U.S.-Mexico border to support Border Patrol operations.