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Transportation Secretary Sean Duffy wants air travelers to be nice this holiday season. A new DOT campaign asks passengers to help each other and thank flight attendants.

Researcher Kari Leibowitz traveled to places with some of the harshest winters on Earth to understand how people thrive in the cold and dark. Her findings may inspire you to find comfort and joy in the season.

Scientists are increasingly concerned that the planet is headed for massive, irreversible changes due to global warming. In some cases, those changes have already begun.

The Trump's administration has ramped up pressure on Venezuelan President Nicolás Maduro by designating the Cartel de los Soles as a foreign terrorist organization.

The word began as a medical diagnosis but over the centuries has evolved to mean the longing for a bygone, idealized past.

A new study finds that the wide range of domestic dog shapes and physical attributes we're familiar with today first started appearing thousands of years ago.

Forty years after the Nevado del Ruiz volcano wiped out the town of Armero, the ghosts of Colombia's deadliest tragedy still haunt its slopes, and families are still searching for lost children.

Harvard University officials have recently raised the alarm on grade inflation. More than 60% of grades awarded to students have been A's. That's up 25% from two decades ago.

When Stacia was 21, she was struggling with severe depression. A stranger's simple question gave her safety during a time she needed it the most. Now, it's an example she's tried to follow ever since.

In an extraordinary journey, a Palestinian man used a jet ski to cross the Mediterranean Sea and reach Europe after he fled the war in Gaza.